- Add migration 002: UNIQUE index on status_logs(camera_id, recorded_at)
- Upgrade migration system to version-tracked (schema_version table)
- Prevents race-condition double-inserts that application-level COUNT(*) check cannot guard against
- Complements existing application-level dedup from CUB-230
- Add request validation: Content-Type check, body size limit (64KB)
- Add field length validation (camera_id: 64, friendly_name: 128, mode: 32, resolution: 32)
- Add FPS range validation (0-240)
- Add battery_pct range validation (0-100)
- Replace ad-hoc map[string]string errors with structured APIError {error, code, details}
- Fix isUniqueConstraintErr to catch both camera_id and mac_address constraint violations
- Fix MacAddress model field from string to *string for NULL handling
- Fix splitSQL to strip -- line comments before splitting (was causing migration failures with modernc.org/sqlite)
- Add 30 integration tests covering all endpoints
- All tests pass: ok github.com/cubecraft/remoterig/internal/api
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