docs: document moderationService.js and add overview

- Added JSDoc to ModerationService class and methods.
- Added architectural overview in docs/moderationService-overview.md.
- Created task log.

Co-authored-by: PR0M3TH3AN <[email protected]>

docs/agents/task-logs/daily/2026-02-16_docs-code-investigator_completed.md

@@ -0,0 +1,21 @@
+# Agent Task Log: docs-code-investigator
+
+- **Status**: Completed
+- **Agent**: docs-code-investigator
+- **Date**: 2026-02-16
+- **Target**: `js/services/moderationService.js`
+
+## Summary
+Analyzed and documented `js/services/moderationService.js`, the core Trust & Safety module implementing the "Web of Trust" model. Added JSDoc to the class and public methods, and created a high-level overview document.
+
+## Actions
+- Analyzed `js/services/moderationService.js` (2560 lines).
+- Added JSDoc for `ModerationService` class and methods: `constructor`, `setViewerPubkey`, `subscribeToReports`, `getTrustedReportSummary`, `refreshViewerFromClient`.
+- Added file-level architectural summary.
+- Created `docs/moderationService-overview.md` with usage examples and data flow description.
+- Verified with `npm run lint` and `tests/moderation-service.test.mjs` + `tests/moderation/*.test.mjs`.
+
+## Artifacts
+- `js/services/moderationService.js` (modified)
+- `docs/moderationService-overview.md` (created)
+- `context/CONTEXT_2026-02-16_docs-code-investigator.md` (created)