Record hook route metadata

[ScriptedAlchemy]

Summary

• add optional daemon hook route metadata for session/thread/cwd/worktree/branch correlation
• enrich Cursor, Codex, and Kiro daemon hook notifications from host hook JSON
• persist received hook route metadata as daemon_hook analytics records for later MCP/tool-call correlation

Tests

• cargo fmt --check
• CARGO_TARGET_DIR=/home/zack/projects/tracedecay/target cargo test mcp::hook_events::tests
• CARGO_TARGET_DIR=/home/zack/projects/tracedecay/target cargo test hook_route_analytics_event_preserves_correlation_fields
• git diff --check

Notes

• Initial cargo test in the new worktree failed with cold target-dir dependency resolution errors; rerunning with the existing parent target dir compiled and passed.
• TraceDecay search surfaced sibling hook-routing worktrees, so this PR keeps the route metadata slice isolated from broader sync routing behavior.

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