Fix duplicate Alembic migration revision ID f7a8b9c0d1e2

Two migrations (add_game_id_to_boss_battles and add_naming_scheme_to_genlockes)
shared the same revision ID, causing multiple heads. Gave boss_battles migration
a new unique ID (g8b9c0d1e2f3) and chained it after the naming_scheme migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/app/alembic/versions/g8b9c0d1e2f3_add_game_id_to_boss_battles.py

@@ -1,7 +1,7 @@
 """add game_id to boss battles
 
-Revision ID: f7a8b9c0d1e2
-Revises: e5f70a1ca323
+Revision ID: g8b9c0d1e2f3
+Revises: f7a8b9c0d1e2
 Create Date: 2026-02-14 12:00:00.000000
 
 """
@@ -12,8 +12,8 @@ import sqlalchemy as sa
 from alembic import op
 
 # revision identifiers, used by Alembic.
-revision: str = "f7a8b9c0d1e2"
-down_revision: str | Sequence[str] | None = "e5f70a1ca323"
+revision: str = "g8b9c0d1e2f3"
+down_revision: str | Sequence[str] | None = "f7a8b9c0d1e2"
 branch_labels: str | Sequence[str] | None = None
 depends_on: str | Sequence[str] | None = None