Issue 1: repo scaffold and project structure

backend/ten31portal/db_init.py

@@ -0,0 +1,15 @@
+"""Run Alembic migrations to head on startup."""
+
+import os
+from pathlib import Path
+
+from alembic import command
+from alembic.config import Config
+
+
+def run_migrations() -> None:
+    """Apply all pending Alembic migrations."""
+    backend_dir = Path(__file__).resolve().parent.parent
+    alembic_cfg = Config(str(backend_dir / "alembic.ini"))
+    alembic_cfg.set_main_option("script_location", str(backend_dir / "alembic"))
+    command.upgrade(alembic_cfg, "head")