Remove the remaining no-op tracing and telemetry-only helpers

The build no longer ships telemetry egress, so the next cleanup pass deletes the remaining tracing compatibility layer and the helper modules whose only job was to shape telemetry payloads. This removes the dead session/beta/perfetto tracing files, drops telemetry-only file-operation and plugin-fetch helpers, and rewires the affected callers to keep only their real product behavior.

Constraint: Preserve existing user-visible behavior and feature-gated product logic while removing inert tracing/reporting scaffolding
Constraint: Leave GrowthBook in place for now because it functions as the repo's local feature-flag adapter, not a live reporting path
Rejected: Delete growthbook.ts in the same pass | Its call surface is wide and now tied to local product behavior rather than telemetry export
Rejected: Leave no-op tracing and helper modules in place | They continued to create audit noise and implied behavior that no longer existed
Confidence: high
Scope-risk: moderate
Reversibility: clean
Directive: Remaining analytics-named code should be treated as either local compatibility calls or feature-gate infrastructure unless a concrete egress path is reintroduced
Tested: bun test src/services/analytics/index.test.ts src/components/FeedbackSurvey/submitTranscriptShare.test.ts
Tested: bun run ./scripts/build.ts
Not-tested: bun x tsc --noEmit (repository has pre-existing unrelated type errors)

src/tools/FileEditTool/FileEditTool.ts

@@ -29,7 +29,6 @@ import {
   fileHistoryEnabled,
   fileHistoryTrackEdit,
 } from '../../utils/fileHistory.js'
-import { logFileOperation } from '../../utils/fileOperationAnalytics.js'
 import {
   type LineEndingType,
   readFileSyncWithMetadata,
@@ -530,12 +529,6 @@ export const FileEditTool = buildTool({
     }
     countLinesChanged(patch)
 
-    logFileOperation({
-      operation: 'edit',
-      tool: 'FileEditTool',
-      filePath: absoluteFilePath,
-    })
-
     logEvent('tengu_edit_string_lengths', {
       oldStringBytes: Buffer.byteLength(old_string, 'utf8'),
       newStringBytes: Buffer.byteLength(new_string, 'utf8'),