docs(04-02): complete deactivation notifications plan

Tasks completed: 1/1
- Add deactivation notification method to notifications class

Phase 4 complete - job deactivation system fully functional.

SUMMARY: .planning/phases/04-job-deactivation-system/04-02-SUMMARY.md

.planning/ROADMAP.md

@@ -13,7 +13,7 @@ None
 - [x] **Phase 1: Foundation & Setup** - Plugin structure, CPT registration, custom role
 - [x] **Phase 2: Provider Registration & Auth** - Registration form, login system, dashboard foundation
 - [x] **Phase 3: Job Management Core** - Job submission, editing, moderation workflow
-- [ ] **Phase 4: Job Deactivation System** - Deactivation workflow with reason capture
+- [x] **Phase 4: Job Deactivation System** - Deactivation workflow with reason capture
 - [ ] **Phase 5: Mentor Job Board** - Protected archive, detail pages, apply system
 - [ ] **Phase 6: Email Notifications** - Admin alerts and mentor opt-in notifications
 - [ ] **Phase 7: Testing & Polish** - End-to-end testing, UI refinement, deployment prep
@@ -65,7 +65,7 @@ Plans:
 
 Plans:
 - [x] 04-01: Job deactivation form (F4) with reason field
-- [ ] 04-02: Admin notification on deactivation with reason
+- [x] 04-02: Admin notification on deactivation with reason
 
 ### Phase 5: Mentor Job Board
 **Goal**: Protected job archive page, job detail page with logo, apply popup form, application email to provider
@@ -110,7 +110,7 @@ Plans:
 | 1. Foundation & Setup | 3/3 | Complete | 2026-01-14 |
 | 2. Provider Registration & Auth | 4/4 | Complete | 2026-01-14 |
 | 3. Job Management Core | 4/4 | Complete | 2026-01-14 |
-| 4. Job Deactivation System | 1/2 | In progress | - |
+| 4. Job Deactivation System | 2/2 | Complete | 2026-01-14 |
 | 5. Mentor Job Board | 0/4 | Not started | - |
 | 6. Email Notifications | 0/3 | Not started | - |
 | 7. Testing & Polish | 0/3 | Not started | - |