Moved models to shared base

app/db/base.py

@@ -1,9 +1,8 @@
-from sqlalchemy.orm import declarative_base
+from app.db.base_class import Base  # noqa: F401
 
+# Import all models so their tables are registered on Base.metadata
+from app.models.user import User         # noqa: F401
+from app.models.server import Server     # noqa: F401
+from app.models.sshkey import SSHKey     # noqa: F401
 from app.models.access_request import AccessRequest  # noqa: F401
-from app.models.audit import AuditEvent  # noqa: F401
-from app.models.server import Server  # noqa: F401
-from app.models.sshkey import SSHKey  # noqa: F401
-from app.models.user import User  # noqa: F401
-
-Base = declarative_base()
+from app.models.audit import AuditEvent   # noqa: F401

app/db/base_class.py

@@ -0,0 +1,13 @@
+from sqlalchemy import MetaData
+from sqlalchemy.orm import declarative_base
+
+# Optional: naming convention keeps Alembic diffs stable
+convention = {
+    "ix": "ix_%(column_0_label)s",
+    "uq": "uq_%(table_name)s_%(column_0_name)s",
+    "ck": "ck_%(table_name)s_%(constraint_name)s",
+    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
+    "pk": "pk_%(table_name)s",
+}
+metadata = MetaData(naming_convention=convention)
+Base = declarative_base(metadata=metadata)