chore: bump version to 10.0.4

Reverts v10.0.3 chroma-mcp spawn storm fix (broken release).
Restores codebase to v10.0.2 state.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/worker-service.ts

@@ -67,7 +67,6 @@ import {
   removePidFile,
   getPlatformTimeout,
   cleanupOrphanedProcesses,
-  cleanupExcessChromaProcesses,
   cleanStalePidFile,
   spawnDaemon,
   createSignalHandler
@@ -335,7 +334,6 @@ export class WorkerService {
   private async initializeBackground(): Promise<void> {
     try {
       await cleanupOrphanedProcesses();
-      await cleanupExcessChromaProcesses();
 
       // Load mode configuration
       const { ModeManager } = await import('./domain/ModeManager.js');