FN-5704: escalate self-owned execution limbo instead of endless resume

Escalate reclaimable in-progress resume limbo into an explicit failure path to stop infinite self-healing loops.

- add resume-limbo escalation handling in self-healing/executor flow so self-owned stuck execution is failed and surfaced
- extend core task/run-audit types and retry-reset/store behavior to persist and expose the new escalation state
- add reliability interaction coverage for reclaim self-owned resume limbo escalation and update related schema/store/CLI/plugin tests and docs

Files changed:
 AGENTS.md                                          |   1 +
 docs/architecture.md                               |   2 +
 packages/cli/src/commands/__tests__/task.test.ts   |   2 +
 packages/core/src/__tests__/db-migrate.test.ts     |  12 +-
 packages/core/src/__tests__/db.test.ts             |  34 ++---
 packages/core/src/__tests__/goals-schema.test.ts   |   2 +-
 packages/core/src/__tests__/insight-store.test.ts  |  10 +-
 packages/core/src/__tests__/mission-store.test.ts  |   2 +-
 packages/core/src/__tests__/run-audit.test.ts      |   2 +-
 packages/core/src/__tests__/secrets-schema.test.ts |   6 +-
 .../core/src/__tests__/store-merge-queue.test.ts   |   2 +-
 packages/core/src/__tests__/task-documents.test.ts |   2 +-
 packages/core/src/db.ts                            |  13 +-
 packages/core/src/manual-retry-reset.ts            |   1 +
 packages/core/src/store.ts                         |  37 ++++-
 packages/core/src/types.ts                         |  11 ++
 ...laim-self-owned-resume-limbo-escalation.test.ts | 168 +++++++++++++++++++++
 packages/engine/src/executor.ts                    |   5 +
 packages/engine/src/run-audit.ts                   |   1 +
 packages/engine/src/self-healing.ts                |  72 +++++++++
 .../src/store/__tests__/roadmap-store.test.ts      |   4 +-
 21 files changed, 345 insertions(+), 44 deletions(-)

Fusion-Task-Id: FN-5704

Fusion-Task-Lineage: c8f73d16-d95b-450f-a514-e7d3c2f7aebe

plugins/fusion-plugin-roadmap/src/store/__tests__/roadmap-store.test.ts

@@ -743,8 +743,8 @@ describe("RoadmapStore", () => {
   });
 
   describe("schema version", () => {
-    it("schema version is 98 after init", () => {
-      expect(db.getSchemaVersion()).toBe(98);
+    it("schema version is 99 after init", () => {
+      expect(db.getSchemaVersion()).toBe(99);
     });
   });