Disable OpenTelemetry instrumentation and reduce state cache invalidations (#1975)

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## Description

Please provide a clear description of your changes.

---

## Type of Change

Please delete options that are not relevant.

- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
- [ ] ✨ New feature (non-breaking change which adds functionality)
- [ ] 💥 Breaking change (fix or feature with breaking changes)
- [ ] 📝 Documentation update
- [ ] 🎨 UI/UX improvement
- [ ] 🔒 Security enhancement
- [ ] ⚡ Performance improvement

## Areas Affected

Please check all that apply:

- [ ] Email Integration (Gmail, IMAP, etc.)
- [ ] User Interface/Experience
- [ ] Authentication/Authorization
- [ ] Data Storage/Management
- [ ] API Endpoints
- [ ] Documentation
- [ ] Testing Infrastructure
- [ ] Development Workflow
- [ ] Deployment/Infrastructure

## Testing Done

Describe the tests you've done:

- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Manual testing performed
- [ ] Cross-browser testing (if UI changes)
- [ ] Mobile responsiveness verified (if UI changes)

## Security Considerations

For changes involving data or authentication:

- [ ] No sensitive data is exposed
- [ ] Authentication checks are in place
- [ ] Input validation is implemented
- [ ] Rate limiting is considered (if applicable)

## Checklist

- [ ] I have read the [CONTRIBUTING](https://github.com/Mail-0/Zero/blob/staging/.github/CONTRIBUTING.md) document
- [ ] My code follows the project's style guidelines
- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in complex areas
- [ ] I have updated the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix/feature works
- [ ] All tests pass locally
- [ ] Any dependent changes are merged and published

## Additional Notes

Add any other context about the pull request here.

## Screenshots/Recordings

Add screenshots or recordings here if applicable.

---

_By submitting this pull request, I confirm that my contribution is made under the terms of the project's license._

    
<!-- This is an auto-generated description by cubic. -->
---

## Summary by cubic
Disabled OpenTelemetry instrumentation and reduced unnecessary state cache invalidations to improve server performance.

- **Refactors**
  - Commented out OpenTelemetry setup and usage in the server entrypoint.
  - Limited calls to invalidate and send state cache in thread and workflow logic.

<!-- End of auto-generated description by cubic. -->

apps/server/src/lib/server-utils.ts

@@ -305,10 +305,10 @@ export const modifyThreadLabelsInDB = async (
   const threadResult = await getThread(connectionId, threadId);
   const shard = await getShardClient(connectionId, threadResult.shardId);
   await shard.stub.modifyThreadLabelsInDB(threadId, addLabels, removeLabels);
-  
+
   const agent = await getZeroSocketAgent(connectionId);
   await agent.invalidateDoStateCache();
-  
+
   await sendDoState(connectionId);
 };
 
@@ -402,8 +402,8 @@ export const getThreadsFromDB = async (
   },
 ): Promise<IGetThreadsResponse> => {
   // Fire and forget - don't block the thread query on state updates
-  const agent = await getZeroSocketAgent(connectionId);
-  await agent.invalidateDoStateCache();
+  //   const agent = await getZeroSocketAgent(connectionId);
+  //   await agent.invalidateDoStateCache();
   void sendDoState(connectionId);
 
   const maxResults = params.maxResults ?? defaultPageSize;

apps/server/src/main.ts

@@ -22,7 +22,7 @@ import {
 } from './lib/attachments';
 import { SyncThreadsCoordinatorWorkflow } from './workflows/sync-threads-coordinator-workflow';
 import { WorkerEntrypoint, DurableObject, RpcTarget } from 'cloudflare:workers';
-import { instrument, type ResolveConfigFn } from '@microlabs/otel-cf-workers';
+// import { instrument, type ResolveConfigFn } from '@microlabs/otel-cf-workers';
 import { getZeroAgent, getZeroDB, verifyToken } from './lib/server-utils';
 import { SyncThreadsWorkflow } from './workflows/sync-threads-workflow';
 import { ShardRegistry, ZeroAgent, ZeroDriver } from './routes/agent';
@@ -824,32 +824,28 @@ const handler = {
   },
 };
 
-const config: ResolveConfigFn = (env: ZeroEnv) => {
-  return {
-    exporter: {
-      url: env.OTEL_EXPORTER_OTLP_ENDPOINT || 'https://api.axiom.co/v1/traces',
-      headers: env.OTEL_EXPORTER_OTLP_HEADERS
-        ? Object.fromEntries(
-            env.OTEL_EXPORTER_OTLP_HEADERS.split(',').map((header: string) => {
-              const [key, value] = header.split('=');
-              return [key.trim(), value.trim()];
-            }),
-          )
-        : {},
-    },
-    service: {
-      name: env.OTEL_SERVICE_NAME || 'zero-email-server',
-      version: '1.0.0',
-    },
-  };
-};
+// const config: ResolveConfigFn = (env: ZeroEnv) => {
+//   return {
+//     exporter: {
+//       url: env.OTEL_EXPORTER_OTLP_ENDPOINT || 'https://api.axiom.co/v1/traces',
+//       headers: env.OTEL_EXPORTER_OTLP_HEADERS
+//         ? Object.fromEntries(
+//             env.OTEL_EXPORTER_OTLP_HEADERS.split(',').map((header: string) => {
+//               const [key, value] = header.split('=');
+//               return [key.trim(), value.trim()];
+//             }),
+//           )
+//         : {},
+//     },
+//     service: {
+//       name: env.OTEL_SERVICE_NAME || 'zero-email-server',
+//       version: '1.0.0',
+//     },
+//   };
+// };
 
 export default class Entry extends WorkerEntrypoint<ZeroEnv> {
   async fetch(request: Request): Promise<Response> {
-    const instrumentedHandler = instrument(handler, config);
-    if (instrumentedHandler && instrumentedHandler.fetch) {
-      return instrumentedHandler.fetch(request as any, this.env, this.ctx);
-    }
     return handler.fetch(request, this.env, this.ctx);
   }
   async queue(

apps/server/src/workflows/sync-threads-workflow.ts

@@ -13,7 +13,7 @@
  *
  * Reuse or distribution of this file requires a license from Zero Email Inc.
  */
-import { getZeroAgent, connectionToDriver, sendDoState } from '../lib/server-utils';
+import { getZeroAgent, connectionToDriver } from '../lib/server-utils';
 import { WorkflowEntrypoint, WorkflowStep } from 'cloudflare:workers';
 import type { WorkflowEvent } from 'cloudflare:workers';
 import { connection } from '../db/schema';
@@ -179,8 +179,8 @@ export class SyncThreadsWorkflow extends WorkflowEntrypoint<ZeroEnv, SyncThreads
         const syncEffects = listResult.threads.map(syncSingleThread);
         await Promise.allSettled(syncEffects);
 
-        await agent.invalidateDoStateCache();
-        await sendDoState(connectionId);
+        // await agent.invalidateDoStateCache();
+        // await sendDoState(connectionId);
         await agent.reloadFolder(folder);
 
         console.log(`[SyncThreadsWorkflow] Completed single page ${pageNumber}`);