migrate db.current_patch_level to SQLAlchemy

unwind/models.py

@@ -30,6 +30,7 @@ JSONObject = dict[str, JSON]
 T = TypeVar("T")
 
 mapper_registry = registry()
+metadata = mapper_registry.metadata
 
 
 def annotations(tp: Type) -> tuple | None:
@@ -203,12 +204,29 @@ def utcnow():
     return datetime.utcnow().replace(tzinfo=timezone.utc)
 
 
+@mapper_registry.mapped
+@dataclass
+class DbPatch:
+    __table__ = Table(
+        "db_patches",
+        metadata,
+        Column("id", Integer, primary_key=True),
+        Column("current", String),
+    )
+
+    id: int
+    current: str
+
+
+db_patches = DbPatch.__table__
+
+
 @mapper_registry.mapped
 @dataclass
 class Progress:
     __table__ = Table(
         "progress",
-        mapper_registry.metadata,
+        metadata,
         Column("id", String, primary_key=True),  # ULID
         Column("type", String, nullable=False),
         Column("state", String, nullable=False),  # JSON {"percent": ..., "error": ...}
@@ -258,7 +276,7 @@ class Progress:
 class Movie:
     __table__ = Table(
         "movies",
-        mapper_registry.metadata,
+        metadata,
         Column("id", String, primary_key=True),  # ULID
         Column("title", String, nullable=False),
         Column("original_title", String),
@@ -336,7 +354,7 @@ Relation = Annotated[T | None, _RelationSentinel]
 class Rating:
     __table__ = Table(
         "ratings",
-        mapper_registry.metadata,
+        metadata,
         Column("id", String, primary_key=True),  # ULID
         Column("movie_id", ForeignKey("movies.id"), nullable=False),  # ULID
         Column("user_id", ForeignKey("users.id"), nullable=False),  # ULID
@@ -393,7 +411,7 @@ class UserGroup(TypedDict):
 class User:
     __table__ = Table(
         "users",
-        mapper_registry.metadata,
+        metadata,
         Column("id", String, primary_key=True),  # ULID
         Column("imdb_id", String, nullable=False, unique=True),
         Column("name", String, nullable=False),
@@ -433,7 +451,7 @@ class GroupUser(TypedDict):
 class Group:
     __table__ = Table(
         "groups",
-        mapper_registry.metadata,
+        metadata,
         Column("id", String, primary_key=True),  # ULID
         Column("name", String, nullable=False),
         Column("users", String, nullable=False),  # JSON array