docs(04-pdf-ingest): create phase 4 plan (4 plans, 4 waves)

Plans 04-01 through 04-04 cover DOC-01, DOC-02, DOC-03:
schema/seed, API routes, UI modal + PDF viewer, human verification.

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

.planning/ROADMAP.md

@@ -81,9 +81,13 @@ Plans:
   2. Agent can view the uploaded PDF rendered in the browser on the document detail page
   3. The forms library reflects updated forms on at least a monthly basis (automated sync or manual re-upload path defined and working)
   4. Uploaded PDFs are stored in the local uploads directory (Docker volume on home server) and survive server restarts
-**Plans**: TBD
+**Plans**: 4 plans
 
-Plans: none yet
+Plans:
+- [ ] 04-01-PLAN.md — Schema (form_templates + documents columns), migration, seed script
+- [ ] 04-02-PLAN.md — API routes: forms-library, documents POST, documents/[id]/file
+- [ ] 04-03-PLAN.md — Add Document modal, PDF viewer page, react-pdf install
+- [ ] 04-04-PLAN.md — Full Phase 4 human verification checkpoint
 
 ### Phase 5: PDF Fill and Field Mapping
 **Goal**: Agent can place signature fields on any page of a PDF and fill in client/property text fields before sending