v0.13.0

Added

• (core) add exact username evidence (#98)
• (mcp) expose identity clusters and evidence (#85)
• (mcp) expose watchlist summary resource (#74)
• (mcp) expose scan timelines
• (server) expose scan timelines API
• (server) add scan timeline model
• (core) add watchlist schedule model
• (core) add watchlist config model
• (mcp) expose scan diffs
• (server) version persisted scan artifacts
• surface confidence across CLI web and MCP
• (core) add profile evidence and confidence models

Added

• (identity graph) expose evidence, confidence, identity clusters, timelines,
  and investigation reports across CLI, Web API, Web UI, and MCP surfaces where
  applicable.
• (cli) support JSON investigation reports with
  --report-scan --report-format json.

Changed

• (hardening) add public JSON/Web/MCP contract snapshots, Web UI smoke
  coverage, and large scan artifact performance checks for Phase 8 release
  readiness.

Docs

• document identity graph privacy and retention expectations, including
  evidence access metadata, local scan ids, and Markdown/JSON report outputs.
• add README guidance for evidence, confidence, identity clusters, and
  investigation reports.