feat(FN-980): add mission autopilot for autonomous slice progression

- Add MissionAutopilot class with state machine (inactive → watching → activating → completing)
- Add autopilot database schema: autopilotEnabled, autopilotState, lastAutopilotActivityAt columns
- Integrate autopilot with scheduler: handleTaskCompletion() triggers slice activation
- Add API routes: GET/PATCH /missions/:id/autopilot, POST start/stop endpoints
- Add autopilot toggle UI in MissionManager dashboard component
- Add retry logic with exponential backoff (up to 3 attempts) for slice activation
- Add background poll (60s) to detect stale autopilot missions
- Include changeset for @gsxdsm/fusion minor bump

packages/core/src/db.test.ts

@@ -89,7 +89,7 @@ describe("Database", () => {
     });
 
     it("seeds schema version", () => {
-      expect(db.getSchemaVersion()).toBe(9);
+      expect(db.getSchemaVersion()).toBe(10);
     });
 
     it("seeds lastModified", () => {
@@ -112,7 +112,7 @@ describe("Database", () => {
 
     it("is idempotent - calling init() twice does not fail", () => {
       expect(() => db.init()).not.toThrow();
-      expect(db.getSchemaVersion()).toBe(9);
+      expect(db.getSchemaVersion()).toBe(10);
     });
 
     it("does not overwrite existing config on re-init", () => {
@@ -719,7 +719,7 @@ describe("schema migrations", () => {
     db.init();
 
     // Verify version bumped to 5 (includes v1→v2, v2→v3, v3→v4, and v4→v5 migrations)
-    expect(db.getSchemaVersion()).toBe(9);
+    expect(db.getSchemaVersion()).toBe(10);
 
     // Verify new columns exist and existing data is intact
     const cols = db.prepare("PRAGMA table_info(tasks)").all() as Array<{ name: string }>;
@@ -744,11 +744,11 @@ describe("schema migrations", () => {
     const db = new Database(kbDir);
     db.init();
 
-    expect(db.getSchemaVersion()).toBe(9);
+    expect(db.getSchemaVersion()).toBe(10);
 
     // Re-init should not fail
     db.init();
-    expect(db.getSchemaVersion()).toBe(9);
+    expect(db.getSchemaVersion()).toBe(10);
 
     db.close();
   });
@@ -843,7 +843,7 @@ describe("schema migrations", () => {
     db.init();
 
     // Verify version bumped to 5
-    expect(db.getSchemaVersion()).toBe(9);
+    expect(db.getSchemaVersion()).toBe(10);
 
     // Verify new columns exist and existing data is intact
     const cols = db.prepare("PRAGMA table_info(tasks)").all() as Array<{ name: string }>;
@@ -1053,7 +1053,7 @@ describe("createDatabase factory", () => {
     const db = createDatabase(kbDir);
     db.init();
 
-    expect(db.getSchemaVersion()).toBe(9);
+    expect(db.getSchemaVersion()).toBe(10);
     expect(db.getLastModified()).toBeGreaterThan(0);
 
     db.close();