fix: match PDF-imported patients by member ID when DOB is missing on record

MassHealth eligibility lookups via the AI chatbot only matched existing
patients on memberId+DOB, so patients imported from PDF extraction (which
have a member ID but no stored birthday) were treated as new/unknown even
though they already exist in the system.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.turbo/preferences/tui.json

@@ -1,4 +1,4 @@
 {
   "is_task_list_visible": true,
-  "active_task": "backend#dev"
+  "active_task": "frontend#dev"
 }