M09 Toolcalls — Execution Context Seam

Implementation toolcalls for Cursor execution.

Timestamp	Tool	Purpose	Files/Target	Status
2026-03-11	write	Populate M09_plan.md with full plan	docs/milestones/M09/M09_plan.md	completed
2026-03-11	run	git checkout main, pull, create branch	git	completed
2026-03-11	write	Create modules/runtime_context.py	modules/runtime_context.py	completed
2026-03-11	search_replace	Attach RuntimeContext in process_images_inner	modules/processing.py	completed
2026-03-11	run	pytest test/smoke	test/smoke	skipped (local env)
2026-03-11	run	pytest test/quality	test/quality	skipped (local env)
2026-03-11	run	git commit, push, gh pr create	git, gh	completed