chore(domain): yourplatform.com → breakpilot.com

Apply the platform-domain decision (2026-05-18) to every README,
workflow, and config in this repo. 4 files updated.

Refs: M1.1

README.md

@@ -39,8 +39,8 @@ For IaC: list the make targets.}}
 | Env   | URL                                  | How                                  |
 |---|---|---|
 | dev   | `http://localhost:8080`          | `make dev`                           |
-| stage | `https://tenant-registry.stage.yourplatform.com` | auto on merge to `main`         |
-| prod  | `https://tenant-registry.yourplatform.com`  | manual: tag `vX.Y.Z` + sign-off      |
+| stage | `https://tenant-registry.stage.breakpilot.com` | auto on merge to `main`         |
+| prod  | `https://tenant-registry.breakpilot.com`  | manual: tag `vX.Y.Z` + sign-off      |
 
 Rollback: `orca rollout undo tenant-registry --env={{env}}`.
 
@@ -48,7 +48,7 @@ Rollback: `orca rollout undo tenant-registry --env={{env}}`.
 
 - Traces, logs, metrics: [SigNoz](https://signoz.meghsakha.com) — service name `tenant-registry`
 - Audit events: Tenant Registry `/audit` (Retraced-shape schema)
-- On-call: `oncall@yourplatform.com` · runbook at `platform/docs/runbooks/tenant-registry.md`
+- On-call: `oncall@breakpilot.com` · runbook at `platform/docs/runbooks/tenant-registry.md`
 
 ## Contributing