feat: add lightweight request tracing for debugging

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Adds JSON-based tracing system for local development that captures
the full request flow through Tatlock's multi-agent architecture.

- Trace/Span dataclasses with automatic timing and nesting
- Context-var based propagation for async-safe tracing
- trace_span async context manager for clean instrumentation
- Traces written to logs/traces/{trace_id}.json
- REST API for listing and retrieving traces (/traces)
- Standalone HTML viewer with timeline visualization

Enabled via DEBUG=true environment variable.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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This commit is contained in:

jpmschweitzer

2025-12-22 10:25:56 +01:00

co-authored by Claude Opus 4.5

parent aa16fe4ffd

commit 60d84535c0

4 changed files with 1804 additions and 1 deletions

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logs/traces/viewer.html

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