code-to10 v6 A14 batch2: test E402/F401 cleanup plus touched-file residual E,F cleanup

(cherry picked from commit 1db02545f74c96b3b92be4fc32954659cec1f814)

Reconcile-conflict: A14b E402 imports referencing cloud.handler_core (does not exist here; core methods live in server.py) — kept HEAD imports with incoming's noqa: E402 markers, dropped the unused core_mod import (verified unused elsewhere in both files).

cloud/tests/test_v2cov_gaps_a.py

@@ -31,26 +31,22 @@ from unittest import mock
 REPO_ROOT = Path(__file__).resolve().parents[2]
 sys.path.insert(0, str(REPO_ROOT))
 
-import cloud.server as server_mod
-from cloud import evidence_binding
-from cloud import gate_verification
-from cloud import ledger_onboarding
-from cloud import ledger_outbox
-from cloud.evidence_binding import (
+import cloud.server as server_mod  # noqa: E402
+from cloud.evidence_binding import (  # noqa: E402
     EvidenceNonceStore,
     bind_evidence,
     binding_presence,
     validate_bound_evidence,
 )
-from cloud.gate_verification import verify_gate_evidence
-from cloud.ledger_onboarding import _table_columns, verify_ledger_ready
-from cloud.ledger_outbox import (
+from cloud.gate_verification import verify_gate_evidence  # noqa: E402
+from cloud.ledger_onboarding import _table_columns, verify_ledger_ready  # noqa: E402
+from cloud.ledger_outbox import (  # noqa: E402
     append_failure,
     outbox_path_for,
     read_failures,
     replay_failures,
 )
-from cloud.server import CloudControlPlaneHandler, init_db
+from cloud.server import CloudControlPlaneHandler, init_db  # noqa: E402
 
 
 def _handler(db_path):