fix(FN-011): make GitProvider methods synchronous and fix __init__ exports

Fusion-Task-Id: FN-011
Fusion-Task-Lineage: 4a9aca6f-9d91-43aa-8d2a-d59657c1541a

apps/api/app/git/provider.py

@@ -18,7 +18,7 @@ class GitProvider(abc.ABC):
         """Return the provider kind identifier."""
 
     @abc.abstractmethod
-    async def validate_connection(
+    def validate_connection(
         self, git_url: str, credential_id: str
     ) -> ConnectionStatus:
         """Validate that the given credential can access *git_url*.
@@ -27,11 +27,11 @@ class GitProvider(abc.ABC):
         """
 
     @abc.abstractmethod
-    async def list_repositories(self, credential_id: str) -> list[dict[str, Any]]:
+    def list_repositories(self, credential_id: str) -> list[dict[str, Any]]:
         """List repositories accessible with *credential_id*."""
 
     @abc.abstractmethod
-    async def create_deploy_key(
+    def create_deploy_key(
         self, git_url: str, public_key: str
     ) -> str:
         """Register a deploy key on the remote provider.
@@ -40,9 +40,9 @@ class GitProvider(abc.ABC):
         """
 
     @abc.abstractmethod
-    async def delete_deploy_key(self, git_url: str, deploy_key_id: str) -> None:
+    def delete_deploy_key(self, git_url: str, deploy_key_id: str) -> None:
         """Remove a previously registered deploy key."""
 
     @abc.abstractmethod
-    async def get_default_branch(self, git_url: str, credential_id: str) -> str:
+    def get_default_branch(self, git_url: str, credential_id: str) -> str:
         """Return the default branch name for the repository at *git_url*."""