feat: complete release readiness work

- consolidate API ownership and remove dead vendor code

- add Stripe billing, learning paths, and public CV hardening

- add migration, recovery, security, audit, and browser gates

docs/research/flowcv-analysis.md

@@ -1,6 +1,3 @@
-# flowcv
-
-TODO: Complete documentation.
 # FlowCV Analysis
 
 ## Purpose
@@ -86,4 +83,4 @@ Job applications.
 
 Tailoring.
 
-Career history.
+Career history.