Monorepo: Gitea CI, docs, auth/sync, backend APIs, gitignore

- Add Gitea Actions workflow; point README to gitea.d-bis.org/Sankofa_Phoenix/SMOA
- Expand .gitignore for Spring H2 data, secrets, Kotlin .kotlin/, tooling
- Track docs/api/generated ReDoc bundle; refresh api docs README
- Android: network/auth/sync, UI shell, tests; backend credentials/integrity APIs
- Docs, scripts (generate-api-docs), modules and core updates

Made-with: Cursor

backend/docs/examples/smoa-client-config.example.json

@@ -0,0 +1,14 @@
+{
+  "schema_version": "1.0",
+  "environment": "production",
+  "api_base_url": "https://api.smoa.example.gov",
+  "api_key": null,
+  "stun_urls": "stun:stun.l.google.com:19302",
+  "signaling_urls": "wss://signal.smoa.example.gov/ws",
+  "turn_urls": "turn:turn.smoa.example.gov:3478?transport=udp",
+  "well_known_health_url": "https://api.smoa.example.gov/health",
+  "openapi_url": "https://api.smoa.example.gov/swagger-ui.html",
+  "tls_pin_spec": "api.smoa.example.gov|sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+  "classification_watermark_primary": "OFFICIAL USE ONLY",
+  "classification_watermark_secondary": "CONTROLLED UNCLASSIFIED"
+}