docs: move implementation PR list into ADR 0006 Status section

Fold the standalone Pull requests section into Status, next to the
Jira ticket reference, instead of a separate section.

Author: fubezz

docs/decisions/0006-cloud-run-otel-telemetry-export.md

@@ -10,7 +10,7 @@ Proposed
 
 Tracked as [OP-3108](https://aignx.atlassian.net/browse/OP-3108)
 
-## Pull requests
+Implementation PRs:
 
 - [gitops#3459](https://github.com/aignostics/gitops/pull/3459) — `aignx-otel-gateway` instance on `shared-tools`, Contour `HTTPProxy`, `k8sAttributes.enabled` toggle.
 - [foundry-python-core#96](https://github.com/aignostics/foundry-python-core/pull/96) — `otel_initialize()`/`instrument_fastapi()` in `aignostics_foundry_core.otel`, wired into `boot()`.