decomposer: fix validation failure for Migrate the kab_ingestion domain models, ports, GitHub SCM connector, and SharePoint CMS connector into the repository's app/ package.; Wire the migrated ingestion components into the agent application entry point, card, settings, triggers, governance, publication, and validation layers.; Populate every remaining placeholder file with working application, package, test, dependency, and Kubernetes content.; Verify the migrated agent and completed repository end to end.

app/settings.py

@@ -0,0 +1,15 @@
+from dataclasses import dataclass
+import os
+
+@dataclass(frozen=True)
+class Settings:
+    github_token: str = ""
+    sharepoint_site_url: str = "https://sharepoint.invalid"
+    allowed_repositories: tuple[str, ...] = ()
+    require_approval: bool = True
+    environment: str = "development"
+
+    @classmethod
+    def from_env(cls) -> "Settings":
+        repos = tuple(x.strip() for x in os.getenv("ALLOWED_REPOSITORIES", "").split(",") if x.strip())
+        return cls(os.getenv("GITHUB_TOKEN", ""), os.getenv("SHAREPOINT_SITE_URL", cls.sharepoint_site_url), repos, os.getenv("REQUIRE_APPROVAL", "true").lower() != "false", os.getenv("ENVIRONMENT", "development"))