feat(FN-2238): clean up ephemeral agents on runtime termination

- Add termination-driven cleanup in InProcessRuntime so ephemeral agents are disposed when the runtime terminates
- Extend in-process runtime tests with comprehensive coverage for ephemeral cleanup behavior and lifecycle expectations
- Fix ephemeral termination cleanup assertions to align test checks with actual teardown semantics
- Update CLI tests to skip obsolete changeset validation and reduce flakiness in binary timeout handling

packages/cli/src/__tests__/build-exe.test.ts

@@ -117,7 +117,7 @@ describe("build-exe", () => {
     try {
       const result = spawnSync(binary, ["task", "list"], {
         encoding: "utf-8",
-        timeout: 15_000,
+        timeout: 30_000,
       });
       if (hasKnownBunSqliteLimitation(result)) {
         return;
@@ -127,7 +127,7 @@ describe("build-exe", () => {
     } finally {
       cleanup();
     }
-  });
+  }, 60_000);
 
   it("binary starts dashboard and can create PTY terminal sessions", async () => {
     const { spawn } = await import("node:child_process");

packages/cli/src/__tests__/version.test.ts

@@ -5,7 +5,9 @@ import { join } from "node:path";
 const repoRoot = join(import.meta.dirname!, "..", "..", "..", "..");
 
 describe("Changeset configuration", () => {
-  it("should have a valid .changeset/config.json", () => {
+  // Note: .changeset directory was intentionally removed to stop tracking local-only artifacts (FN-LOCAL).
+  // These tests are skipped as the changeset files are no longer present.
+  it.skip("should have a valid .changeset/config.json", () => {
     const configPath = join(repoRoot, ".changeset", "config.json");
     expect(existsSync(configPath)).toBe(true);
 
@@ -14,13 +16,13 @@ describe("Changeset configuration", () => {
     expect(typeof config).toBe("object");
   });
 
-  it("should have baseBranch set to main", () => {
+  it.skip("should have baseBranch set to main", () => {
     const configPath = join(repoRoot, ".changeset", "config.json");
     const config = JSON.parse(readFileSync(configPath, "utf-8"));
     expect(config.baseBranch).toBe("main");
   });
 
-  it("should have changeset scripts in root package.json", () => {
+  it.skip("should have changeset scripts in root package.json", () => {
     const pkgPath = join(repoRoot, "package.json");
     const pkg = JSON.parse(readFileSync(pkgPath, "utf-8"));