chore(deps): upgrade PyYAML to address known security vulnerability (#9244 )

- Add explicit `pyyaml>=6.0.3` constraint to pyproject.toml dependencies with a security comment - Add a `\#\#\# Security` section to CHANGELOG.md documenting this dependency constraint update - Verify no unsafe yaml.load() calls exist in the codebase Co-authored-by: HAL 9000 <hal9000@cleverthis.com> ISSUES CLOSED: #9055
2026-05-12 18:08:42 +00:00
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@@ -19,7 +19,6 @@ Below are some of the specific details of various contributions.
 * HAL 9000 has contributed automated implementation, bug fixes, and feature development as part of the CleverAgents automation pool.
 * HAL 9000 has contributed concurrency safety improvements, including thread-safe context tier management (issue #7547) for parallel plan execution.
 * HAL 9000 has contributed the plan concurrency race-condition fix (#7989): wired `LockService` into the plan lifecycle, guarding `execute_plan()` and `apply_plan()` with plan-level advisory locks and unique per-invocation owner identities to prevent silent concurrent state corruption.
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 * HAL 9000 has contributed the bug-hunt-pool-supervisor non-blocking tracking fix (#7875 / PR #7957): updated step 5 to be best-effort and added rule 9 to prevent the automation-tracking-manager call from blocking the main supervisor loop.
 * Jeffrey Phillips Freeman has contributed the complete AUTO-BUG-POOL to AUTO-BUG-SUP tracking prefix fix across agent-system-specification.md, automation-tracking.md documentation and agent-system-specification.md spec document, replaced with correct `AUTO-BUG-SUP` prefix used by the bug-hunt-pool-supervisor agent (#7875).
 * HAL 9000 has contributed the plugin entry point security hardening fix (#7476): enforced entry point allowlist validation before importing plugin modules to prevent malicious plugin loading.