Add Settings -> Database viewer (Adminer) for local devs and any admin

Local dev gets an unauthenticated Adminer instance bound to loopback
only. In production, any account with is_admin=true can open it -
the app mints a short-lived token from a live admin session, which
Nginx's new db.ciagent.org block exchanges for a session cookie that
re-checks admin status on every request, instead of a shared static
password that wouldn't scale to multiple admins or revoke live.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

apps/api/app/core/security.py

@@ -75,6 +75,11 @@ def verify_password(raw_password: str, password_hash: str) -> bool:
 class TokenType(StrEnum):
     ACCESS = "access"
     REFRESH = "refresh"
+    # Settings -> Database viewer: a short-lived token minted from a live
+    # admin session, exchanged (via Nginx's db.ciagent.org /_auth route) for
+    # a longer-lived DB_VIEWER_SESSION cookie. See app/api/v1/db_viewer.py.
+    DB_VIEWER_BOOTSTRAP = "db_viewer_bootstrap"
+    DB_VIEWER_SESSION = "db_viewer_session"
 
 
 @dataclass(frozen=True)
@@ -105,6 +110,14 @@ def create_refresh_token(user_id: uuid.UUID, settings: Settings) -> tuple[str, s
     return token, jti, expires_at
 
 
+def create_db_viewer_bootstrap_token(user_id: uuid.UUID, settings: Settings) -> str:
+    return _encode_token(user_id, TokenType.DB_VIEWER_BOOTSTRAP, timedelta(minutes=2), settings)
+
+
+def create_db_viewer_session_token(user_id: uuid.UUID, settings: Settings) -> str:
+    return _encode_token(user_id, TokenType.DB_VIEWER_SESSION, timedelta(minutes=60), settings)
+
+
 def _encode_token(
     user_id: uuid.UUID,
     token_type: TokenType,