Remove Supabase

The database moved to a container of our own; the platform is gone.
This takes out what was left of it — and, where the leftovers were load
bearing, moves rather than deletes.

Moved, not deleted:

  supabase/migrations/  -> db/migrations/      the schema's source of truth
  supabase/build-org.ts -> scripts/build-org.ts
  lib/supabase/types.ts -> lib/types.ts        52 import sites repointed

The bookkeeping needed care. It lived in `supabase_migrations.schema_migrations`,
and simply renaming the schema would have left the runner facing an empty
table: it would have called all 67 migrations pending and replayed them
against a database that is long since current. So the runner now creates
`migrationen.schema_migrations` and, once, copies the old rows across —
guarded so a second run does nothing and a fresh database skips it entirely.
Only then does migration 20260907100000 drop the old schema.

Deleted: the CLI config, the seed, the historical schema/function dumps
(nothing read them), scripts/umzug-von-supabase.sh (the move is done), and
both Supabase packages plus the CLI. Nothing in the application imported
them — the build now succeeds with no environment variables at all, which
is the proof.

Integration tests: six of them signed in through Supabase Auth and asserted
against the anon key and the service role. That model is gone, so the tests
were not portable — they are deleted. session-context and
employee-status-filter already ran on pg and are untouched; om-reporting is
ported to a direct connection because it guards a real risk (the reporting
line rule exists twice, once in SQL and once in TypeScript).

CI: the integration job started a Supabase stack. It now runs a postgres
service, applies deploy/db-init and every migration to an empty database —
that was the valuable part, and it still holds — then checks that a second
run is a no-op, which is what proves the bookkeeping works.

Docs: security-review.md audited a service-role key, a cookie adapter and
auth.users, none of which exist. Restating findings about removed components
would suggest today's system had been reviewed; it has not. It now records
what was removed and says a fresh review is due. data-model.md was already
marked obsolete and described the pre-OM schema; azure-migration.md was a
plan for a route not taken. Both deleted.

Verified: npm ci, typecheck, lint, 445 tests, build — all clean without the
packages. Integration tests skip cleanly with no database. Migration SQL and
the runner are reviewed but NOT executed: no Docker here, and the old
instance no longer resolves.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/integration/om-reporting.test.ts

@@ -1,37 +1,64 @@
-import { describe, expect, it } from "vitest";
+import { Pool } from "pg";
+import { afterAll, describe, expect, it } from "vitest";
 import { todayIso } from "@/lib/format";
 import { resolveReportingLines, type OmHolder, type OmUnit } from "@/lib/om-reporting";
-import { adminClient } from "./helpers";
 
 // Die Berichtslinien-Regel existiert zweimal: als om_reporting_lines() in
 // der Datenbank und als resolveReportingLines() im Anwendungscode. Zwei
 // Fassungen derselben Regel driften auseinander, und die Abweichung fällt
 // niemandem auf — im Organigramm stünde einfach eine andere Führungskraft
 // als im Export. Also über den gesamten Bestand gegeneinanderhalten.
-describe("om_reporting_lines stimmt mit resolveReportingLines überein", () => {
+//
+// Eigene Verbindung statt der Zugriffsschicht: geprüft wird die Regel, nicht
+// die Berechtigung. Mit dem Zeilenschutz dazwischen liefe der Vergleich über
+// eine gefilterte Teilmenge und bewiese nichts.
+const pool = new Pool({ connectionString: process.env.DATABASE_URL, max: 2 });
+
+describe.skipIf(!process.env.DATABASE_URL)("om_reporting_lines stimmt mit resolveReportingLines überein", () => {
   const asOf = todayIso();
 
-  async function fromDatabase() {
-    const { data, error } = await adminClient.rpc("om_reporting_lines", { p_as_of: asOf });
-    if (error) throw new Error(error.message);
-    return data ?? [];
+  afterAll(async () => {
+    await pool.end();
+  });
+
+  type DbZeile = { employee_id: string; formal_manager_id: string | null; acting_manager_id: string | null };
+
+  async function fromDatabase(): Promise<DbZeile[]> {
+    const { rows } = await pool.query<DbZeile>("select * from om_reporting_lines($1)", [asOf]);
+    return rows;
   }
 
   async function fromTypeScript() {
-    const [{ data: units }, { data: assignments }] = await Promise.all([
-      adminClient.from("org_units").select("id, parent_id"),
-      adminClient
-        .from("position_assignments")
-        .select("employee_id, position_id, valid_from, valid_to, om_positions(org_unit_id, is_chief, valid_from, valid_to)")
-        .lte("valid_from", asOf)
-        .or(`valid_to.is.null,valid_to.gt.${asOf}`),
-    ]);
+    const { rows: units } = await pool.query<{ id: string; parent_id: string | null }>(
+      "select id, parent_id from org_units"
+    );
 
-    const { data: employees } = await adminClient
-      .from("employees")
-      .select("id, karenz_start_date, karenz_return_date");
-    const absentById = new Map(
-      (employees ?? []).map((e) => [
+    // Dieselbe Gültigkeitsprüfung wie in der Datenbankfunktion: halboffen,
+    // das Ende ausgeschlossen. Sie steht hier ausgeschrieben und nicht als
+    // Aufruf einer gemeinsamen Hilfsfunktion — sonst prüfte der Test die
+    // Regel gegen sich selbst.
+    const { rows: besetzungen } = await pool.query<{
+      employee_id: string;
+      position_id: string;
+      org_unit_id: string;
+      is_chief: boolean;
+    }>(
+      `select a.employee_id, a.position_id, p.org_unit_id, p.is_chief
+         from position_assignments a
+         join om_positions p on p.id = a.position_id
+        where a.valid_from <= $1 and (a.valid_to is null or a.valid_to > $1)
+          and p.valid_from <= $1 and (p.valid_to is null or p.valid_to > $1)`,
+      [asOf]
+    );
+
+    const { rows: personen } = await pool.query<{
+      id: string;
+      karenz_start_date: string | null;
+      karenz_return_date: string | null;
+    }>("select id, karenz_start_date, karenz_return_date from employees");
+
+    const abwesend = new Map(
+      personen.map((e) => [
         e.id,
         Boolean(
           e.karenz_start_date && e.karenz_start_date <= asOf && (!e.karenz_return_date || asOf < e.karenz_return_date)
@@ -39,22 +66,14 @@ describe("om_reporting_lines stimmt mit resolveReportingLines überein", () => {
       ])
     );
 
-    const omUnits: OmUnit[] = (units ?? []).map((u) => ({ id: u.id, parentId: u.parent_id }));
-    const holders: OmHolder[] = (assignments ?? [])
-      .filter((a) => {
-        const p = a.om_positions as unknown as { valid_from: string; valid_to: string | null } | null;
-        return p && p.valid_from <= asOf && (p.valid_to === null || p.valid_to > asOf);
-      })
-      .map((a) => {
-        const p = a.om_positions as unknown as { org_unit_id: string; is_chief: boolean };
-        return {
-          employeeId: a.employee_id,
-          positionId: a.position_id,
-          orgUnitId: p.org_unit_id,
-          isChief: p.is_chief,
-          absent: absentById.get(a.employee_id) ?? false,
-        };
-      });
+    const omUnits: OmUnit[] = units.map((u) => ({ id: u.id, parentId: u.parent_id }));
+    const holders: OmHolder[] = besetzungen.map((a) => ({
+      employeeId: a.employee_id,
+      positionId: a.position_id,
+      orgUnitId: a.org_unit_id,
+      isChief: a.is_chief,
+      absent: abwesend.get(a.employee_id) ?? false,
+    }));
 
     return resolveReportingLines(omUnits, holders);
   }
@@ -83,8 +102,7 @@ describe("om_reporting_lines stimmt mit resolveReportingLines überein", () => {
 
   it("gibt genau einer Person keine Führungskraft — der obersten Leitung", async () => {
     const db = await fromDatabase();
-    const wurzel = db.filter((r) => r.acting_manager_id === null);
-    expect(wurzel).toHaveLength(1);
+    expect(db.filter((r) => r.acting_manager_id === null)).toHaveLength(1);
   });
 
   it("erzeugt keine Berichtslinie auf sich selbst", async () => {