codegen us-core example: list in top-level README, tighten POST section

- Top-level README: add the new example to the Developer Experience
  section ("@atomic-ehr/codegen: US Core Profiles in TypeScript: CSV
  -> FHIR Bundle") so it's discoverable from the repo root.
- Example README POST section: drop the long narrative about
  per-install BOX_ROOT_CLIENT_SECRET and the separate verification
  queries; the section is now one prose line + one command block
  doing the docker compose + curl POST in sequence.

Author: ryukzak

README.md

@@ -60,6 +60,7 @@ A collection of examples on top of Aidbox FHIR platform
 - [Agentic FHIR Implementation Guide Development](developer-experience/agentic-coding-ig-development/)
 - [Aidbox Firely .NET Client](developer-experience/aidbox-firely-dotnet-client/)
 - [Aidbox HAPI FHIR Client](developer-experience/aidbox-hapi-client/)
+- [@atomic-ehr/codegen: US Core Profiles in TypeScript: CSV -> FHIR Bundle](developer-experience/atomic-ehr-codegen-typescript-us-core-profiles/)
 
 ## Documentation
 

developer-experience/atomic-ehr-codegen-typescript-us-core-profiles/README.md

@@ -42,23 +42,17 @@ Avg BP: 125.2/82.0 mmHg (n=5)
 
 ## POST to a FHIR Server (Optional)
 
-Any FHIR-compliant server accepts the generated `bundle.json` at its root endpoint. To try it end-to-end, [run Aidbox in Docker](https://www.health-samurai.io/docs/aidbox/getting-started/run-aidbox-locally) in two minutes; the setup writes a `docker-compose.yaml` with a per-install `BOX_ROOT_CLIENT_SECRET`. Read it back with `awk` so the curl commands keep working when the secret rotates:
+Run [Aidbox](https://www.health-samurai.io/fhir-server) locally and POST `bundle.json`:
 
 ```bash
+curl -JO https://aidbox.app/runme && docker compose up -d
 SECRET=$(awk '/BOX_ROOT_CLIENT_SECRET:/{print $2}' docker-compose.yaml)
 
-curl -u "root:$SECRET" -X POST \
-  -H "Content-Type: application/fhir+json" \
+curl -u "root:$SECRET" -X POST -H "Content-Type: application/fhir+json" \
   -d @bundle.json http://localhost:8080/fhir
 ```
 
-Aidbox resolves the `urn:uuid` references to concrete Patient IDs during the transaction commit -- check with:
-
-```bash
-curl -u "root:$SECRET" "http://localhost:8080/fhir/Patient?family=Lovelace"
-curl -u "root:$SECRET" "http://localhost:8080/fhir/Observation?code=http://loinc.org|85354-9" \
-  | jq '.entry[].resource.subject.reference'
-```
+Aidbox resolves the `urn:uuid` references during the transaction commit.
 
 ## Notes on the Code