Work Packages: concurrent-template-config-race-4589-01M35M6B
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Work Package WP01: Concurrent YAML/cache race: thread-local instances + single-flight lock at both fix sites
Dependencies: None Requirement Refs: FR-001, FR-002, FR-003, FR-004, FR-005, FR-006, FR-007, FR-008, NFR-001, NFR-002, NFR-003, C-001, C-002, C-003, C-004 Owned Files: src/charter/offering/missions/mission_step_repository.py, src/charter/offering/missions/mission_type_repository.py, tests/core/test_mission_creation_identity.py Subtasks: T001, T002, T003, T004, T005, T006, T007 Prompt: tasks/WP01-concurrent-yaml-cache-race-fix.md