fix: clean sidecar bootstrap lint contracts

Author: apstenku123

scripts/audit_sidecar_parquet.py

@@ -29,7 +29,7 @@
 import pyarrow.compute as pc  # noqa: E402
 import pyarrow.parquet as pq  # noqa: E402
 
-from scripts.sidecar_manifest_contract import AUDIT_SCHEMA, audit_contract
+from scripts.sidecar_manifest_contract import AUDIT_SCHEMA, audit_contract  # noqa: E402
 
 
 def _load_schema_contracts():

scripts/download_verified_sidecar_from_nebius_s3.py

@@ -29,10 +29,9 @@
 if str(REPO_ROOT) not in sys.path:
     sys.path.insert(0, str(REPO_ROOT))
 
-from scripts.sidecar_manifest_contract import (
+from scripts.sidecar_manifest_contract import (  # noqa: E402
     AUDIT_FILENAME,
     AUDIT_REMOTE,
-    MANIFEST_SCHEMA,
     contained_path,
     resolve_s3_env,
     validate_audit_receipt,

scripts/upload_verified_sidecar_to_nebius_s3.py

@@ -29,7 +29,7 @@
 if str(REPO_ROOT) not in sys.path:
     sys.path.insert(0, str(REPO_ROOT))
 
-from scripts.sidecar_manifest_contract import (
+from scripts.sidecar_manifest_contract import (  # noqa: E402
     AUDIT_FILENAME,
     AUDIT_REMOTE,
     AUDIT_SCHEMA,

tests/test_production_objective_mixer.py

@@ -74,7 +74,6 @@
     OBJECTIVE_CONTRACT_SCHEMA,
     OBJECTIVE_GRAPH_SIDECARS,
     OBJECTIVE_KIND_IDS,
-    OBJECTIVE_MATERIALIZATION_ARTIFACT_SCHEMA,
     build_pre_materialized_objective_contract,
     materialize_megatron_document,
     objective_route_mapping_contract,