The processOutput() method was a stub with no implementation. The
ContentProcessingService dependency it accepted is from the external
host-uk/core package and its API is not available here. Content
is already persisted via markCompleted() so no output processing
was ever performed.
Removes:
- processOutput() stub method
- ContentProcessingService import and handle() parameter
- target_type/target_id guard block that called the stub
Adds unit tests covering: prompt validation, entitlement checks,
provider availability, task completion metadata, usage recording,
and template variable interpolation.
Closes#17
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
