fix(lint): auto-fix ruff violations and tune lint rules

- Auto-fixed 4,496 lint issues (import sorting, modern syntax, etc.)
- Added ignore rules for patterns intentional in this codebase:
  E402 (late imports), E712 (SQLAlchemy filters), B904 (raise from),
  SIM108/SIM105/SIM117 (readability preferences)
- Added per-file ignores for tests and scripts
- Excluded broken scripts/rename_terminology.py (has curly quotes)

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

alembic/versions_backup/fa7d4d10e358_add_rbac_enhancements.py

@@ -7,7 +7,7 @@ Create Date: 2025-11-13 16:51:25.010057
 SQLite-compatible version
 """
 
-from typing import Sequence, Union
+from collections.abc import Sequence
 
 import sqlalchemy as sa
 
@@ -15,9 +15,9 @@ from alembic import op
 
 # revision identifiers, used by Alembic.
 revision: str = "fa7d4d10e358"
-down_revision: Union[str, None] = "4951b2e50581"
-branch_labels: Union[str, Sequence[str], None] = None
-depends_on: Union[str, Sequence[str], None] = None
+down_revision: str | None = "4951b2e50581"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
 
 
 def upgrade():
@@ -80,10 +80,10 @@ def upgrade():
     # SQLite-compatible UPDATE with subquery
     op.execute(
         """
-        UPDATE vendor_users 
-        SET user_type = 'owner' 
+        UPDATE vendor_users
+        SET user_type = 'owner'
         WHERE (vendor_id, user_id) IN (
-            SELECT id, owner_user_id 
+            SELECT id, owner_user_id
             FROM vendors
         )
     """
@@ -92,8 +92,8 @@ def upgrade():
     # Set existing owners as active
     op.execute(
         """
-        UPDATE vendor_users 
-        SET is_active = TRUE 
+        UPDATE vendor_users
+        SET is_active = TRUE
         WHERE user_type = 'owner'
     """
     )