fix(git): isolate catalog commands from parent hook environment

src/lib/services/git-process-environment.test.ts

@@ -0,0 +1,20 @@
+import { expect, it } from "vitest";
+import { gitProcessEnvironment } from "./git-process-environment";
+
+it("does not pass parent repository paths into catalog Git commands", () => {
+	const env = gitProcessEnvironment({
+		NODE_ENV: "test",
+		PATH: "tools",
+		GIT_DIR: "parent",
+		GIT_WORK_TREE: "parent",
+		GIT_INDEX_FILE: "parent-index",
+		GIT_COMMON_DIR: "common",
+		GIT_AUTHOR_NAME: "Catalog",
+	});
+	expect(env.GIT_DIR).toBeUndefined();
+	expect(env.GIT_WORK_TREE).toBeUndefined();
+	expect(env.GIT_INDEX_FILE).toBeUndefined();
+	expect(env.GIT_COMMON_DIR).toBeUndefined();
+	expect(env.PATH).toBe("tools");
+	expect(env.GIT_AUTHOR_NAME).toBe("Catalog");
+});