New endpoints — HRM Campaigns and Events

Added a new family of endpoints under /v1/hrm for pulling Human Risk Management data into BI and reporting tools:

• GET /v1/hrm/campaigns — list phishing simulation campaigns
• GET /v1/hrm/campaigns/{campaign_id} — fetch a single campaign
• GET /v1/hrm/events — list user engagement events across campaigns

All three support filtering, sorting, and pagination.