Add the missing plan prompt CLI command and wire it through the local A2A facade into PlanLifecycleService so operator guidance can be injected into active execute-phase plans per the specification. The lifecycle flow now validates active state, records user-intervention decisions, and returns structured queue/decision metadata for rich and machine-readable output envelopes across all supported formats.
Also stabilize flaky quality gates discovered while implementing #885 by hardening integration helper timeouts, relaxing an overly strict CLI-core timing assertion, defaulting test worker concurrency to serial for determinism, switching ASV to spawn launch mode for runner stability, and documenting the controlled transform sandbox exec/compile path for static security hooks.
ISSUES CLOSED: #885
Co-authored-by: Brent E. Edwards <brent.edwards@cleverthis.com>
Co-committed-by: Brent E. Edwards <brent.edwards@cleverthis.com>
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