feat(14-02): add RssAdapter.parseFeed + 'rss' normalizer dispatch

Fixture-first RSS parsing (INGEST-04): parses live-captured
service.bund.de (pubDate present, numeric-HTML-entity titles) and
subreport-elvis (pubDate absent, CDATA titles) feed shapes into
RawTenderRecord[] via fast-xml-parser, mirroring the DoeOpenDataAdapter
config. SourceType extended with 'rss'; normalize() dispatches 'rss'
through the existing normalizeBag() path unchanged (D-04/D-05).

Rule 1 fix: fast-xml-parser only decodes the 5 predefined XML entities,
not numeric character references — added an explicit decode step so
service.bund.de titles ("Übermittlung...") render correctly
instead of leaking raw entity syntax.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/api/src/tenders/tender-normalizer.service.spec.ts

@@ -81,7 +81,11 @@ function bagRecord(
   },
 ): RawTenderRecord {
   const sourcePortal =
-    sourceType === 'cosinex-dtvp' ? 'cosinex-dtvp' : 'tender24';
+    sourceType === 'cosinex-dtvp'
+      ? 'cosinex-dtvp'
+      : sourceType === 'rss'
+        ? 'service-bund'
+        : 'tender24';
   return {
     sourceType,
     sourcePortal,
@@ -317,4 +321,38 @@ describe('TenderNormalizerService', () => {
       expect(normalized.contentHash).toMatch(/^[a-f0-9]{64}$/);
     });
   });
+
+  describe("'rss' sourceType (Phase 14, Plan 02, INGEST-04)", () => {
+    it('maps an rss bag through normalizeBag(): title passes through, cpvDivisions stays empty', () => {
+      const raw = bagRecord('rss', {
+        title: 'Übermittlung von Bohrungsdaten',
+        buyerName: null,
+        procedureType: null,
+        legalFramework: null,
+        deadlineAt: null,
+      });
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.title).toBe('Übermittlung von Bohrungsdaten');
+      expect(normalized.cpvDivisions).toEqual([]);
+      expect(normalized.cpvCodes).toEqual([]);
+      expect(normalized.region).toBeNull();
+      expect(normalized.bundesland).toBeNull();
+      expect(normalized.buyerName).toBeNull();
+      expect(normalized.procedureType).toBeNull();
+      expect(normalized.deadlineAt).toBeNull();
+      expect(normalized.dedupKey).toBe(
+        `${raw.sourcePortal}:${raw.sourceNoticeId}`,
+      );
+    });
+
+    it('rss title falls back to "Unbenannte Ausschreibung" when empty', () => {
+      const raw = bagRecord('rss', { title: '' });
+
+      const normalized = service.normalize(raw);
+
+      expect(normalized.title).toBe('Unbenannte Ausschreibung');
+    });
+  });
 });