feat: split gitea-issue-resolver into 9 specialized agent skills + orchestrator

- gitea-analyse-architektur (Phase 1)
- gitea-implementierung (Phase 2)
- gitea-code-review (Phase 3)
- gitea-test-qa (Phase 4)
- gitea-fix-refactoring (Phase 5, on demand)
- gitea-merge-release (Phase 6)
- gitea-deployment (Phase 7)
- gitea-abnahme-validierung (Phase 8)
- gitea-dokumentation-closing (Phase 9)
- gitea-issue-resolver updated as pipeline orchestrator
- Only issues tagged KI + ReadyForDev are processed

memory/email-check.log

@@ -2609,3 +2609,34 @@ ERROR: AGENTMAIL_API_KEY not set
 ERROR: AGENTMAIL_API_KEY not set
 ERROR: AGENTMAIL_API_KEY not set
 ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set
+ERROR: AGENTMAIL_API_KEY not set