Remove contextCollector dependency from council_finalize and append
Athena runtime guidance directly to the tool's JSON response string.
This fixes the timing bug where guidance registered via contextCollector
only arrived on the next message cycle, too late for Athena's same-turn
synthesis.
- Remove ContextCollector import, RegisterContext type, and collector.register() block
- Append buildAthenaRuntimeGuidance() output after JSON result with \n\n separator
- Simplify createCouncilFinalize() factory call in tool-registry (no options)
- Update unit tests: replace collector mock assertions with direct output string checks
- Update integration tests: wrap JSON.parse with extractJson() helper for hybrid output
council_read was a sandboxed readFile wrapper for .sisyphus/ archives.
Now that council_finalize extracts member responses into plain files,
the standard Read tool serves the same purpose. Removes the tool, its
tests, and updates Athena's prompt to reference Read directly.
task-output-writer wrote to process.cwd()/.sisyphus/task-outputs/ while
council_finalize read from ctx.directory/.sisyphus/task-outputs/. When
these differ, all output files appear missing.
Fix by passing directory to writeTaskOutput from BackgroundManager, and
adding basePath to council_read. Also removes process.chdir() from tests
that was masking the bug.
ismeth