Stabilize A2A Wake Substrate Integrity

Context During the stabilization of the DreamService pipeline (PR #10495), we triaged a critical phenomenon where A2A "wake subscriptions" were disappearing. This ticket separates the foundational Wake Substrate integrity work from the immediate token-exhaustion fixes of #10495 to ensure architectural clarity and prevent test-result pollution.

The Problem A2A wake subscriptions are being prematurely pruned or leaking state across test boundaries:

1. WakeSubscriptionService.spec.mjs was leaking state due to liveCursor persistence across Playwright test iterations, leading to cross-worker pollution.
2. SQLite.clear() and aggressive GraphMaintenanceService apoptosis were pruning production-adjacent WAKE_SUBSCRIPTION nodes during test runs, effectively killing live agent subscriptions.

The Architectural Reality

• Test Isolation: The Playwright test suites currently lack strict boundary enforcement for shared singleton states like liveCursor in WakeSubscriptionService.mjs.
• Graph Durability: GraphService.getOrphanedNodes and related garbage collection (Apoptosis) routines currently do not whitelist or protect critical node types like WAKE_SUBSCRIPTION from being swept during aggressive cleanup operations.
• Storage Layer: The SQLite service lacks robust temp-path verification, risking unintended side-effects on production databases during test execution.

The Fix Isolate and harden the A2A Wake Substrate:

1. GC/Apoptosis Protection: Implement WAKE_SUBSCRIPTION whitelisting/protection rules within GraphService to prevent them from being orphaned and deleted by Apoptosis.
2. Test Harness Isolation: Establish canonical test-harness isolation for GraphService and WakeSubscriptionService (e.g., implementing strict beforeEach/afterEach resets for liveCursor and subscriptionCache).
3. SQLite Durability: Add robust SQLite temp-path verification and boundary guards to guarantee safe test execution without production graph bleed.
4. Regression Coverage: Add bridge-level diagnostic regression tests.

Acceptance Criteria

• WAKE_SUBSCRIPTION nodes are protected from GraphService apoptosis sweeps.
• WakeSubscriptionService test suites enforce strict state isolation (liveCursor resets) preventing cross-worker leakage.
• SQLite test operations are strictly bounded to verified temp-paths.
• New diagnostic regression tests exist for wake subscription persistence.
• Swarm A2A signals correctly persist and route across IDE and daemon harnesses without unexpected disappearances.

Out of Scope

• Non-wake-related Graph Apoptosis tuning.
• Expanding A2A syntax or routing logic beyond persistence fixes.
• Tri-Vector or DreamService optimizations (handled in PR #10495).

Origin Session ID: df8049d8-56ad-417b-ae0e-17a38e22a0ae Retrieval Hint: "A2A wake subscription disappearance theory" and PR #10495 split.