ctxwitch 0.3.4

Two-path witch tour, full 12-dimension scan --diff scorecard, and a scan-first README.

v0.3.2 - behavioral-risk reframe + wordmark

• Reframed to behavioral risk: "Scan AI agent changes for behavioral risk"
  (README), "Behavioral risk analysis for AI agent changes" (About / PyPI / docstring).
• New wordmark logo in the README header.
• PyPI demo-image / README rendering fix.

No API changes - witch scan, witch ci, and the GitHub Action are unchanged since 0.3.0.

v0.3.1 - behavioral scans on every PR, no telemetry

What's Changed

• Adds witch scan + witch ci + GitHub Action
• runs locally, zero telemetry
• fixes PyPI demo image