Add evidence-first crawl analysis

[KingAkeem]

Summary

Adds a CLI-first Analyst workflow on top of the versioned crawl-result contract from #408. It produces a cited Markdown report, evidence ledger, relationship graph, and reproducibility metadata from a saved crawl.

Highlights

• adds --save result with bounded visible text and SHA-256 hashes
• adds torbot analyze with deterministic findings and optional Ollama or OpenAI-compatible analysis
• requires explicit approval before remote transmission and redacts contact data by default
• validates every model citation against known evidence IDs
• keeps deterministic exports available when the model is offline
• includes JSON schemas, a safe example.com fixture, and a five-minute quick start

Verification

• 55 pytest tests pass
• flake8 passes
• source distribution and wheel build successfully
• offline CLI smoke test produces all four documented artifacts

This PR intentionally targets the contract branch and should be retargeted to dev after #408 is approved and merged.