fix(context): resolve PR #10590 review blockers and compliance items

- Remove unused TYPE_CHECKING imports (DomainContextStrategy, StrategyCapabilities) from acms_service.py — they are only referenced in docstrings, not type annotations, causing F401 lint errors. This resolves the lint failure that was introduced by the prior commit b5b08e25's attempt to move them into the TYPE_CHECKING block.
- Fix line-length violation (E501) on StrategyCapabilities docstring — shortened :mod: directive reference to fit 88-char limit.

ISSUES CLOSED: #10590

src/cleveragents/application/services/acms_service.py

@@ -32,10 +32,6 @@ import structlog
 
 if TYPE_CHECKING:
     from cleveragents.config.settings import Settings
-    from cleveragents.domain.models.acms.strategy import (
-        ContextStrategy as DomainContextStrategy,
-        StrategyCapabilities as DomainStrategyCapabilities,
-    )
     from cleveragents.infrastructure.database.unit_of_work import UnitOfWork
     from cleveragents.infrastructure.plugins.manager import PluginManager
 
@@ -116,7 +112,7 @@ class StrategyCapabilities:
     """Pipeline-specific capabilities declared by a context strategy.
 
     This is a backward-compatible variant of the domain-model
-    ``DomainStrategyCapabilities`` (see :mod:`cleveragents.domain.models.acms.strategy`).
+    ``~cleveragents.domain.models.acms.strategy.DomainStrategyCapabilities``.
     For production strategies that implement the true spec protocol, use
     ``DomainStrategyCapabilities`` instead.
     """