app/api/routers/auth.py:188:        if account.oauth_token:
app/api/routers/auth.py:189:            account.oauth_token.access_token = tokens["access_token"]
app/api/routers/auth.py:190:            account.oauth_token.refresh_token = tokens.get("refresh_token") or account.oauth_token.refresh_token
app/api/routers/auth.py:191:            account.oauth_token.expires_at = expires_at
app/api/routers/auth.py:192:            account.oauth_token.granted_scopes = tokens.get("scope", "")
app/api/routers/auth.py:194:            account.oauth_token = OAuthToken(
app/api/routers/auth.py:208:        account.oauth_token = OAuthToken(
app/api/routers/accounts.py:25:    t = account.oauth_token
app/api/routers/accounts.py:83:    token = account.oauth_token
app/api/routers/accounts.py:137:    token = account.oauth_token
app/api/routers/accounts.py:169:        token = account.oauth_token
===
4:  oauth_tokens.access_token / refresh_token
86:    # Encrypted SMTP OAuth2 credentials mirror (kept in oauth_tokens; this is metadata only)
92:    oauth_token = relationship("OAuthToken", back_populates="account", uselist=False,
107:    __tablename__ = "oauth_tokens"
117:    account = relationship("GmailAccount", back_populates="oauth_token")