feat: add 6 video pipeline blips and propagate session learnings to CLAUDE.md New blips: Detection-then-Identity Video Pipeline (Techniques/Trial), Semantic Frame Scoring (Techniques/Assess), CLIP (Languages/Trial), PySceneDetect (Tools/Trial), PySlowFast (Languages/Assess), VideoAgent (Tools/Assess). CLAUDE.md updated with project context, blog-as-technique rule, and WebSearch workaround. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>