Feat/m5 capacity management#7

Merged

iamodh merged 15 commits intomainfrom

feat/m5-capacity-management

Feb 20, 2026

Commits on Feb 20, 2026

docs: add commit history to M2-M4 milestones and update commit workflow

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feat(m5): add Course#full? method

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docs: mark Course#full? as complete

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feat(m5): add Course#available? and Race.upcoming scope

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docs: mark Course#available? as complete

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docs: add skinny controller fat model convention to CLAUDE.md

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docs: add concurrency testing approach to Issues #1 (M5, M6)

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feat(m5): add Course#create_registration! with lock! and concurrency test

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docs: mark capacity concurrency test as complete

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feat(m5): use create_registration! in controller with capacity exceeded handling

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docs: mark M5 capacity management as complete

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docs: add save vs create! issue to Issues #2

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docs: add concurrency test principles and gem usage rules to CLAUDE.md

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feat(m5): add flash message rendering to layout with smoke test

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fix(m3): change phone_number validation from maximum 11 to exactly 11 digits

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