fix(db): remove redundant a5_007 merge migration (m4_004 already merged into m8_002 on master)

src/cleveragents/infrastructure/database/migrations/versions/a5_007_merge_m4_004_and_a5_006.py

@@ -1,35 +0,0 @@
-"""Merge m4_004_schema_parity and a5_006_action_invariants heads.
-
-``m4_004_schema_parity_resource_decision_checkpoint`` branched off
-``m4_003_plan_env_columns`` independently of the main migration chain
-(m5_001 -> m8_002 -> m6_006 -> m9_001 -> m9_002 -> a5_006), creating two
-Alembic heads.  This no-op merge migration resolves them into a single
-head so that ``alembic upgrade head`` and the template-DB creation
-script work correctly.
-
-Revision ID: a5_007_merge_m4_004_and_a5_006
-Revises: m4_004_schema_parity_resource_decision_checkpoint,
-         a5_006_action_invariants_unique_constraint
-Create Date: 2026-04-24 00:00:00
-"""
-
-from collections.abc import Sequence
-
-# revision identifiers, used by Alembic.
-revision: str = "a5_007_merge_m4_004_and_a5_006"
-down_revision: str | Sequence[str] | None = (
-    "m4_004_schema_parity_resource_decision_checkpoint",
-    "a5_006_action_invariants_unique_constraint",
-)
-branch_labels: str | Sequence[str] | None = None
-depends_on: str | Sequence[str] | None = None
-
-
-def upgrade() -> None:
-    """No-op merge migration."""
-    pass
-
-
-def downgrade() -> None:
-    """No-op merge migration."""
-    pass