test(core): trim redundant test resets and use mockClear

src/infra/ports.test.ts

@@ -91,7 +91,7 @@ describe("ports helpers", () => {
 
 describeUnix("inspectPortUsage", () => {
   beforeEach(() => {
-    runCommandWithTimeoutMock.mockReset();
+    runCommandWithTimeoutMock.mockClear();
   });
 
   it("reports busy when lsof is missing but loopback listener exists", async () => {

src/infra/process-respawn.test.ts

@@ -17,7 +17,7 @@ afterEach(() => {
   envSnapshot.restore();
   process.argv = [...originalArgv];
   process.execArgv = [...originalExecArgv];
-  spawnMock.mockReset();
+  spawnMock.mockClear();
 });
 
 function clearSupervisorHints() {