fix: error logging, evidence auth, partial data warnings

[chitcommit]

Summary

Addresses findings from comprehensive PR review of #60:

• CRITICAL: Add error logging to all 11 empty catch blocks across ledgerClient, connectClient.discover, and MCP connect_discover handler
• IMPORTANT: Add CHITTYEVIDENCE_TOKEN to Env type and Bearer auth to evidence client (was the only service client without auth)
• IMPORTANT: Return error field from ledger_facts/ledger_contradictions when ChittyEvidence is unconfigured (instead of silently returning empty data)
• IMPORTANT: Wrap get_case_timeline DB queries in independent try-catch blocks for partial data collection
• HIGH: Add warnings/partial fields to timeline response when data sources fail
• MINOR: Fix stale test description ("38 tools" → "48 tools")

Test plan

• tsc --noEmit passes
• Verify timeline endpoint includes warnings array when a data source fails
• Verify evidence client sends Bearer auth when CHITTYEVIDENCE_TOKEN is set
• Verify MCP ledger_facts returns error field when evidence URL is unset

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1ba997c4-1db0-4b14-96b9-8e9f36f75331

📥 Commits

Reviewing files that changed from the base of the PR and between 770161c and b25fee5.

📒 Files selected for processing (5)

• src/index.ts
• src/lib/integrations.ts
• src/routes/mcp.ts
• src/routes/timeline.ts
• tests/mcp.test.ts

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4. @claude review
   Adversarial review request: evaluate security, policy bypass paths, regression risk, and merge-gating bypass attempts.

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