fix: add complete cycle detection for blocked_by relationships#67
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- Fixed AddBlockedBy to check cycles in both blocking and blocked_by graphs - Updated AddBlocking to also check blocked_by for cross-relationship cycles - Added cycle validation to CreateBean when blocked_by is provided - Added validation that blocking/blocked_by targets exist at creation time - Updated DetectCycle in beancore to support blocked_by link type - Added comprehensive tests for cycle detection scenarios: - blocked_by-only cycles - cross-relationship cycles (blocking ↔ blocked_by) - self-reference prevention - nonexistent bean validation Refs: #62
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Summary
Fixed incomplete cycle detection that previously allowed cycles to be created using only
blocked_byrelationships or mixingblockingandblocked_byin ways that created conflicts.Changes
blockingandblocked_bygraph traversalsCreateBeanto verify targets exist and check for immediate cyclesAddBlockingto detect cycles viablocked_byrelationships and vice versaAll tests pass.