fix: restore docs deleted in v0.2.3 release, add Paperclip branding

- Restored docs/ directory that was accidentally deleted by `git add -A`
  in the v0.2.3 release script
- Replaced generic "P" favicon with actual paperclip icon using brand
  primary color (#2563EB)
- Added light/dark logo SVGs for Mintlify navbar (paperclip icon + wordmark)
- Updated docs.json with logo configuration for dark/light mode
- Fixed release.sh to stage only release-related files instead of `git add -A`
  to prevent sweeping unrelated changes into release commits

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

docs/guides/board-operator/activity-log.md

@@ -0,0 +1,55 @@
+---
+title: Activity Log
+summary: Audit trail for all mutations
+---
+
+Every mutation in Paperclip is recorded in the activity log. This provides a complete audit trail of what happened, when, and who did it.
+
+## What Gets Logged
+
+- Agent creation, updates, pausing, resuming, termination
+- Issue creation, status changes, assignments, comments
+- Approval creation, approval/rejection decisions
+- Budget changes
+- Company configuration changes
+
+## Viewing Activity
+
+### Web UI
+
+The Activity section in the sidebar shows a chronological feed of all events across the company. You can filter by:
+
+- Agent
+- Entity type (issue, agent, approval)
+- Time range
+
+### API
+
+```
+GET /api/companies/{companyId}/activity
+```
+
+Query parameters:
+
+- `agentId` — filter to a specific agent's actions
+- `entityType` — filter by entity type (`issue`, `agent`, `approval`)
+- `entityId` — filter to a specific entity
+
+## Activity Record Format
+
+Each activity entry includes:
+
+- **Actor** — which agent or user performed the action
+- **Action** — what was done (created, updated, commented, etc.)
+- **Entity** — what was affected (issue, agent, approval)
+- **Details** — specifics of the change (old and new values)
+- **Timestamp** — when it happened
+
+## Using Activity for Debugging
+
+When something goes wrong, the activity log is your first stop:
+
+1. Find the agent or task in question
+2. Filter the activity log to that entity
+3. Walk through the timeline to understand what happened
+4. Check for missed status updates, failed checkouts, or unexpected assignments