Record Facts intake delivery and validation (#46)

docs/signup-facts.md

@@ -3,6 +3,7 @@
 Task [#46](https://git.sendico.io/tech/sxchnge/issues/46), branch
 `identity-facts-46`. Primary module: identity-facts; secondary modules: auth,
 customer creation, runtime, shared database source and Flutter error feedback.
+Delivery: [PR #47](https://git.sendico.io/tech/sxchnge/pulls/47), targeting `main`.
 
 ## Behavior and boundaries