fix: bind template version migration json

backend/migrations/versions/20260512_0016_create_contract_template_versions.py

@@ -110,9 +110,8 @@ def _backfill_template_version_metadata() -> None:
             continue
 
         hash_suffix = hashlib.sha1(str(row["id"]).encode("utf-8")).hexdigest()[:12]
-        bind.execute(
-            sa.text(
-                """
+        insert_stmt = sa.text(
+            """
                 INSERT INTO contract_template_versions (
                     id,
                     template_id,
@@ -145,7 +144,9 @@ def _backfill_template_version_metadata() -> None:
                     :created_at
                 )
                 """
-            ),
+        ).bindparams(sa.bindparam("variables_json", type_=sa.JSON()))
+        bind.execute(
+            insert_stmt,
             {
                 "id": f"tplver-{hash_suffix}",
                 "template_id": row["id"],

scripts/deploy-backend-docker.ps1

@@ -272,7 +272,7 @@ mkdir -p backend
 tar -xzf "`$archive" --strip-components=1 -C backend
 test -f backend/Dockerfile
 test -f backend/app/main.py
-docker compose -f "`$compose" build --no-cache backend
+docker compose -f "`$compose" build backend
 docker compose -f "`$compose" up -d backend
 docker compose -f "`$compose" ps backend frontend postgres redis
 if [ "`$keep_archive" != "true" ]; then rm -f "`$archive"; fi