fix: prevent worker daemon from being killed by its own hooks (#1490)

Three independent fixes for worker daemon instability:

1. Remove version mismatch auto-restart from ensureWorkerStarted() (#1435).
   The marketplace bundle ships with __DEFAULT_PACKAGE_VERSION__ unbaked,
   causing BUILT_IN_VERSION to fall back to "development". This creates a
   100% reproducible mismatch on every hook call, killing a healthy worker
   and often failing to restart. Same pattern across #566, #665, #667,
   #669, #689, #1124, #1145 (8+ releases).

2. Add process.ppid and PID-file PID to aggressiveStartupCleanup()
   exclusions (#1426). Without this, a newly spawned daemon SIGKILLs
   the hook process that spawned it and any already-running worker
   the PID file points to.

3. Increase POST_SPAWN_WAIT from 5s to 15s (#1423). The 5s timeout was
   sized for Linux (<1s startup) but macOS ARM64 cold starts take 6-8s
   with Chroma enabled.

src/services/infrastructure/ProcessManager.ts

@@ -453,6 +453,18 @@ export async function aggressiveStartupCleanup(): Promise<void> {
   const pidsToKill: number[] = [];
   const allPatterns = [...AGGRESSIVE_CLEANUP_PATTERNS, ...AGE_GATED_CLEANUP_PATTERNS];
 
+  // Protect parent process (the hook that spawned us) and the PID-file-registered
+  // worker from being killed. Without this, a new daemon kills its own parent hook
+  // process (#1426) and any already-running worker the PID file points to.
+  const protectedPids = new Set<number>([currentPid]);
+  if (process.ppid && process.ppid > 0) {
+    protectedPids.add(process.ppid);
+  }
+  const pidFileInfo = readPidFile();
+  if (pidFileInfo?.pid && pidFileInfo.pid > 0) {
+    protectedPids.add(pidFileInfo.pid);
+  }
+
   try {
     if (isWindows) {
       // Use WQL -Filter for server-side filtering (no $_ pipeline syntax).
@@ -475,7 +487,7 @@ export async function aggressiveStartupCleanup(): Promise<void> {
 
       for (const proc of processList) {
         const pid = proc.ProcessId;
-        if (!Number.isInteger(pid) || pid <= 0 || pid === currentPid) continue;
+        if (!Number.isInteger(pid) || pid <= 0 || protectedPids.has(pid)) continue;
 
         const commandLine = proc.CommandLine || '';
         const isAggressive = AGGRESSIVE_CLEANUP_PATTERNS.some(p => commandLine.includes(p));
@@ -518,7 +530,7 @@ export async function aggressiveStartupCleanup(): Promise<void> {
         const etime = match[2];
         const command = match[3];
 
-        if (!Number.isInteger(pid) || pid <= 0 || pid === currentPid) continue;
+        if (!Number.isInteger(pid) || pid <= 0 || protectedPids.has(pid)) continue;
 
         const isAggressive = AGGRESSIVE_CLEANUP_PATTERNS.some(p => command.includes(p));