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/attackers/behavior.py

@@ -7,11 +7,14 @@ from datetime import datetime, timezone
 from typing import Any, Optional
 
 from sqlalchemy import select
+from sqlmodel import col
 
 from decnet.web.db.models import Attacker, AttackerBehavior
 
 
-class AttackerBehaviorMixin:
+from decnet.web.db.sqlmodel_repo._helpers import _MixinBase
+
+class AttackerBehaviorMixin(_MixinBase):
     async def upsert_attacker_behavior(
         self,
         attacker_uuid: str,
@@ -56,9 +59,9 @@ class AttackerBehaviorMixin:
             return {}
         async with self._session() as session:
             result = await session.execute(
-                select(Attacker.ip, AttackerBehavior)
+                select(col(Attacker.ip), AttackerBehavior)
                 .join(AttackerBehavior, Attacker.uuid == AttackerBehavior.attacker_uuid)
-                .where(Attacker.ip.in_(ips))
+                .where(col(Attacker.ip).in_(ips))
             )
             out: dict[str, dict[str, Any]] = {}
             for ip, row in result.all():