feat(ProcessManager): add Bun availability check and improve PID file validation

- Implemented a method to check if Bun is available in the system PATH.
- Updated the startWithBun method to return an error if Bun is not found.
- Enhanced PID file parsing to validate required fields and their types.
- Cleaned up stale PID files if the process is no longer alive.

fix(SettingsRoutes): clear port cache after updating settings

- Added a call to clearPortCache after writing updated settings to ensure the application uses the latest configuration.

docs/public/platform-integration.mdx

@@ -57,9 +57,9 @@ CLAUDE_MEM_PYTHON_VERSION=3.13              # Python version for chroma-mcp
 ```bash
 npm run build                 # Compile TypeScript (hooks + worker)
 npm run sync-marketplace      # Copy to ~/.claude/plugins
-npm run worker:restart        # Restart PM2 worker
+npm run worker:restart        # Restart worker
 npm run worker:logs           # View worker logs
-pm2 list                      # Check worker status
+npm run worker:status         # Check worker status
 ```
 
 ## Worker Architecture
@@ -1132,8 +1132,8 @@ esbuild.build({
   </Step>
   <Step title="Terminal 2: Check worker status">
     ```bash
-    pm2 list
-    pm2 logs claude-mem-worker
+    npm run worker:status
+    npm run worker:logs
     ```
   </Step>
   <Step title="Terminal 3: Test API manually">
@@ -1238,7 +1238,7 @@ describe('Worker Integration', () => {
 
 <AccordionGroup>
   <Accordion title="Phase 1: Connection & Health">
-    - [ ] Worker starts successfully (`pm2 list`)
+    - [ ] Worker starts successfully (`npm run worker:status`)
     - [ ] Health endpoint responds (`curl http://localhost:37777/api/health`)
     - [ ] SSE stream connects (`curl http://localhost:37777/stream`)
   </Accordion>