fix(10): resolve GET /source-config 404 shadowed by :id route

The admin source-config settings form failed to load with "Failed to
fetch tender-radar source config". Network trace showed
GET /modules/tender-radar/source-config returning 404.

Root cause: NestJS RouterExplorer maps routes in method-declaration
order. `@Get(':id')` was declared before `@Get('source-config')`, so
the param route captured "source-config" as an id and shadowed the
static handler (401 unauthenticated, 404 past the guard — no Tender
with id "source-config").

Fix: declare `@Get('source-config')` before `@Get(':id')`. Add a
declaration-order regression test — unit tests call controller methods
directly, bypass routing, and could never catch route shadowing.

Verified live: settings form now loads real config, interval save
persists and live-re-registers the scheduler (INGEST-06). Phase 10
verification raised human_needed -> passed after full browser UAT.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/api/src/tenders/tenders.controller.spec.ts

@@ -105,3 +105,22 @@ describe('TendersController — admin source-config applies live to the schedule
     expect(scheduler.setInterval).not.toHaveBeenCalled();
   });
 });
+
+describe('TendersController — route declaration order (static route before :id)', () => {
+  // Regression guard for the GET /source-config → 404 bug: NestJS RouterExplorer
+  // maps routes in method-declaration order. When `@Get(':id')` is declared
+  // before `@Get('source-config')`, the param route captures "source-config" as
+  // an id and shadows the static handler — 401 unauthenticated, 404 once past the
+  // guard (Tender "source-config" not found). Unit-calling the methods directly
+  // (the tests above) bypasses routing and cannot catch this, so we assert the
+  // declaration order explicitly.
+  it('declares getSourceConfig before getTender so GET /:id cannot shadow it', () => {
+    const methods = Object.getOwnPropertyNames(TendersController.prototype);
+    const sourceConfigIdx = methods.indexOf('getSourceConfig');
+    const idIdx = methods.indexOf('getTender');
+
+    expect(sourceConfigIdx).toBeGreaterThanOrEqual(0);
+    expect(idIdx).toBeGreaterThanOrEqual(0);
+    expect(sourceConfigIdx).toBeLessThan(idIdx);
+  });
+});