feat(cloud)!: send X-APIForge-Key instead of X-API-Key

Matches the saas-api header rename (CDC section 8.4.1). Breaking
change for cloud mode users — must ship together with the saas-api
and other SDKs' companion renames.

Verified end-to-end: CloudTransport.write_routes() against a local
saas-api test instance registers the route correctly with the new
header. 83/83 tests still pass.

Author: Fabien83560

apiforgepy/cloud_transport.py

@@ -32,7 +32,7 @@ def write_routes(self, routes: list[dict]) -> None:
         req = urllib.request.Request(
             self._url + "/routes",
             data=payload,
-            headers={"Content-Type": "application/json", "X-API-Key": self._api_key},
+            headers={"Content-Type": "application/json", "X-APIForge-Key": self._api_key},
             method="POST",
         )
         try:
@@ -83,7 +83,7 @@ def write(self, rows: list[dict]) -> None:
         req = urllib.request.Request(
             self._url,
             data=payload,
-            headers={"Content-Type": "application/json", "X-API-Key": self._api_key},
+            headers={"Content-Type": "application/json", "X-APIForge-Key": self._api_key},
             method="POST",
         )