docs(05-02): complete job application form plan

Created SUMMARY.md documenting:
- Job application form with email notification system
- Pre-filled email for logged-in mentors
- Provider receives full applicant context
- Direct reply capability for providers

Updated STATE.md:
- Phase 5 Plan 2 complete
- Added 4 decisions to accumulated context
- Updated velocity metrics

Updated ROADMAP.md:
- Marked 05-02 complete
- Updated progress to 2/4 for Phase 5

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.planning/phases/05-mentor-job-board/05-02-SUMMARY.md

@@ -0,0 +1,32 @@
+# Phase 5 Plan 2: Job Application Form Summary
+
+**Mentors can now apply to jobs with email notifications sent directly to providers**
+
+## Accomplishments
+
+- Created programmatic job application form with 4 fields (name, email, message, job_id)
+- Logged-in mentors have email pre-filled for convenience
+- Application submissions trigger email notification to provider contact email
+- Email includes full context: applicant details and job information
+- Provider can reply directly to applicant email address
+- Error logging handles missing contact email or wp_mail failures
+
+## Files Created/Modified
+
+- `includes/class-formidable.php` - Added create_job_application_form() method with applicant fields and email pre-fill logic, added get_job_application_form_id() helper, registered form creation in setup_registration_hooks()
+- `includes/class-notifications.php` - Added send_provider_application_notification() method with Formidable form submission hook, extracts entry data, fetches job context, sends email to provider contact email
+
+## Decisions Made
+
+- Email pre-fill uses current_user email for logged-in mentors for convenience
+- Form stays on detail page after submission (no redirect) to keep user context
+- Application notification follows established pattern from other notifications (German template, error logging, HTML email)
+- Provider email sourced from ACF field job_contact_email (established in Phase 01-03)
+
+## Issues Encountered
+
+None
+
+## Next Step
+
+Ready for parallel execution with 05-01 and 05-03 (independent plans).