Backend Aug 22-25: AI analysis, welcome-packet templating, LetterStream, DocuSeal, staff RBAC + tier gate

- analysis.py: deterministic claim scorer + /analyze /approve /letter /advance-tier endpoints (auto-runs on intake)
- packet.py + packet_fields.json: welcome-packet templating engine (6 onboarding docs, field catalog)
- letterstream.py + letters.py: certified-mail send pipeline + letter lifecycle (webhook verified)
- docuseal.py: DocuSeal signing integration
- staff.py/models.py/schema.sql/auth.py: approval actor from staff key, tier gate (APPROVED+ACTIVE+onboarding docs), onboarding_docs table
- frontend/: dependency-free static portal (intake, magic-link login/verify, dashboard)
- landing-mockups/: 4 design-stance mockups + favicons
- legal/: aup/privacy/sms-terms/terms HTML
- docs/: letter-queue scope, letterstream API contract, 6 welcome-packet templates
- review-dre-landing-2026-08-21.md: 3-variant landing feedback sprint
- compliance/DRE_Compliance_Manual.md: updated

Source synced from deployed /opt/dre-portal/app/ (was 4 days ahead of git).

backend/main.py

@@ -28,14 +28,18 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-# Include routers (intake, claims, staff)
+# Include routers (intake, claims, staff, packet)
 from .intake import router as intake_router  # noqa: E402
 from .claims import router as claims_router  # noqa: E402
 from .staff import router as staff_router  # noqa: E402
+from .packet import router as packet_router  # noqa: E402
+from .letters import router as letters_router  # noqa: E402
 
 app.include_router(intake_router)
 app.include_router(claims_router)
 app.include_router(staff_router)
+app.include_router(packet_router)
+app.include_router(letters_router)
 
 
 def _err(code: str, message: str, status_code: int):
@@ -46,6 +50,9 @@ def _err(code: str, message: str, status_code: int):
 @app.on_event("startup")
 async def _startup():
     db.init_db()
+    # Ensure the welcome-packet overrides table exists on existing DBs.
+    from . import packet
+    packet.ensure_packet_table()
     logger.info("DRE portal started; db=%s", db.get_db_path())