v1.0.9 - Kiro 1.0 new session format and minor improvements

Summary

Adds support for the new Kiro 1.0 session storage format (~/.kiro/sessions/), which replaced the old workspace-sessions directory in late June. Without this, no new conversations were being indexed.

Changes

Kiro 1.0 Session Loader

• New discovery function _list_kiro_sessions() scans ~/.kiro/sessions/<sha256_prefix>/<session_id>/
• New message loader _load_kiro_session_messages() parses messages.jsonl extracting user, assistant, and tool context messages
• Tool call/result pairs generate compact tool context summaries for searchability
• Skips system message types (session_start, session_metadata, turn_start/end, usage_summary, etc.)
• Code block replacement and skip-message filtering applied to new format
• Deduplication: when a session exists in both old and new locations, the Kiro 1.0 version wins
• SHA256-prefix directory naming validated against real data

Dashboard

• Added "Newest message" timestamp to status dashboard (local time with AM/PM)
• Warning indicator (orange) when newest message is >1 day old
• Error indicator (red) when newest message is >4 days old — likely stalled indexing

CI

• Added GitHub Actions workflow (test.yml) running full test suite on Python 3.11/3.12/3.13
• Triggers on all branches except main, and on PRs to main

Documentation

• README: new "Session Data Sources (macOS)" table documenting all 5 formats with locations
• Architecture steering: added "Session Formats (IDE)" section with format specs
• Development steering: updated fixture list and test structure

Testing

• 54 new tests covering discovery, message loading, tool context generation, edge cases, deduplication
• Full suite: 769 tests passing, zero regressions