fix(types): P2 — wire _MixinBase + col() across sqlmodel_repo; suppress pydantic/SQLModel column typing false positives

- Add _MixinBase abstract class to _helpers.py: declares _session(),
  _deserialize_attacker(), _assert_pending(), _check_and_bump_version(),
  and list_running_topology_deckies() so mypy can see cross-mixin contracts
- Add _require(val, msg) helper for narrowing T | None → T
- Inherit _MixinBase in all 26 leaf mixin classes
- Wrap SQLAlchemy column method calls (.is_(), .like(), .notin_(), .in_(),
  .contains()) with col() from sqlmodel — fixes attr-defined false positives
  caused by pydantic plugin typing class-level fields as Python value types
- Wrap select(Model.field) with select(col(Model.field)) for column projections
- Add pyproject.toml [[tool.mypy.overrides]] to disable arg-type in
  sqlmodel_repo.*: pydantic plugin resolves .where(Model.field == v) as
  where(bool), a false positive; call-arg still catches real argument errors
- Remove 9 stale # type: ignore comments (logging, helpers, credentials)
- Fix telemetry.py traced() overload no-redef + misc
- Fix logs.py datetime/str operator and nullable PK comparison with col()
- sqlmodel_repo/ now has 0 mypy errors

decnet/web/db/sqlmodel_repo/attacker_intel.py

@@ -13,11 +13,14 @@ from datetime import datetime, timezone
 from typing import Any, Optional
 
 from sqlalchemy import desc, or_, select
+from sqlmodel import col
 
 from decnet.web.db.models import Attacker, AttackerIntel
 
 
-class AttackerIntelMixin:
+from decnet.web.db.sqlmodel_repo._helpers import _MixinBase
+
+class AttackerIntelMixin(_MixinBase):
     """Mixin: methods composed onto ``SQLModelRepository``.
 
     Expects ``self._session()`` from the base.
@@ -82,13 +85,13 @@ class AttackerIntelMixin:
         now = datetime.now(timezone.utc)
         async with self._session() as session:
             stmt = (
-                select(Attacker.uuid, Attacker.ip)
+                select(col(Attacker.uuid), col(Attacker.ip))
                 .outerjoin(
                     AttackerIntel, AttackerIntel.attacker_uuid == Attacker.uuid,
                 )
                 .where(
                     or_(
-                        AttackerIntel.uuid.is_(None),
+                        col(AttackerIntel.uuid).is_(None),
                         AttackerIntel.expires_at < now,
                     )
                 )