chore: add ninja-build and build-essential to package requirements; update README and documentation to reflect changes in model configuration and local Transformers usage

refactor: remove sample_pose_cache module and streamline pose processing in pipeline

feat(coach): disable verifier by default

feat: expand coach summary training pipeline

test: cover external coach knowledge retrieval

feat(pipeline): implement sample pose caching and enhance upload handling

Implement grounded coach summary with HF SLM

Refactor(pipeline): improve code readability and update function calls for clarity

Merge branch 'main' into NLag/issue4

feat(report): stream analysis progress

Enhance UnknownExercise class with debug data handling and add test for manual unknown exercise in pipeline

feat(report): add annotated issue clips

refactor(exercises): route pipeline through exercise objects

fix(classifier): default auto routing to squat

feat(renderer): generate annotated pose videos

feat(pipeline): persist rep debug artifacts

refactor(exercises): centralize exercise definitions

feat(video): add intake quality gate

feat(pipeline): harden mock artifact contracts