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

scripts/export-openapi-local.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Export OpenAPI JSON from a running SMOA backend (default http://localhost:8080).
+# Usage: ./scripts/export-openapi-local.sh [BASE_URL] [OUTPUT_PATH]
+set -euo pipefail
+BASE="${1:-http://localhost:8080}"
+OUT="${2:-openapi-export.json}"
+curl -sSf "${BASE%/}/v3/api-docs" -o "$OUT"
+echo "Wrote $OUT"