Issue 31: Dashboard Audit Log Views

[laraibg786]

Goal

Add detailed audit log views to the Streamlit dashboard showing all vendor events (license creation, activation, heartbeat, revocation, policy changes) with filtering, search, pagination, and CSV export.

Requirements

Functional

• Audit event table displaying last 100 events with pagination.
• Filter by: date range, event type (LICENSE_CREATED, ACTIVATED, HEARTBEAT_RECEIVED, LICENSE_REVOKED, POLICY_UPDATED), status (SUCCESS, FAILED).
• Search by: license key, customer name, device fingerprint hash.
• Drill-down view: click an event row to see full payload details.
• Export filtered events as RFC 4180 CSV with timestamp in filename.
• Real-time event count widget on the main dashboard.

Technical

• Event Types: LICENSE_CREATED, LICENSE_MODIFIED, LICENSE_REVOKED, ACTIVATION_REQUESTED, ACTIVATION_SUCCESS, ACTIVATION_FAILED, HEARTBEAT_RECEIVED, HEARTBEAT_GRACE_ENTERED, HEARTBEAT_EXPIRED, POLICY_UPDATED.
• Tenant isolation enforced: vendor sees only their own events.

Acceptance Criteria

• Audit table loads with correct events for the authenticated vendor.
• Filters and search correctly narrow results.
• Drill-down shows full event payload.
• CSV export downloads correctly with all filtered events.

Dependencies

• Blocked by: Issue 15: Audit Event Service and CSV Export #15, Issue 26: Vendor Management Dashboard (Streamlit) #26.
• Blocks: Nothing.