Register the replay of issue 239: a module's name is not taken over by another repository

Its replay (mesh-controller #294) holds the photo app's outage of 2026-10-04 against the fix that
refuses a build from a repository other than the module's own (mesh-controller #174).

replays/register.go

@@ -562,6 +562,22 @@ var Register = []Replay{
 		Asserts: "two builds of one Go module whose sources differ only outside its build source give one digest",
 		Package: "./internal/builder", Test: "TestReplay363", Files: []string{"internal/builder/replay363_test.go"},
 		Home: "mesh-controller", HomeRef: "94c928b1f5af099c328eb6950550b6380df24b31"},
+	// A module's name was taken over by another repository (2026-10-04): the photo app's module was registered from
+	// the app's own repository, and rebuilding it "to main" built the catalogue's stub of the same name instead. The
+	// controller registered the outcome, recorded the catalogue as the module's source, and the next push replaced the
+	// app with the stub: two sites' containers and five routes went. The fix (mesh-controller #174, hq ADR 0266 §7)
+	// registers an outcome only from the repository the module is registered from, unless asked at the controller's
+	// terminal. A test of its own in the controller, written with only what it had before — a mesh, RegisterModule,
+	// SourceOf, a kept build request, takeIn — laid over the commit before. Needs a store: MESH_TEST_POSTGRES. Fix is
+	// the merge of its pull request; Home is the commit that added the replay, reachable once its pull request merges.
+	{ID: "R239", Issue: 239, Kind: InRepository, Repository: "mesh-controller", Fix: "eb7a15808641f2075d9fd1660fa0e949b9cd7230",
+		What: "a build of a module's name from another repository was registered over the module's own, and the next " +
+			"push replaced the photo app with the catalogue's stub",
+		Asserts: "a build asked through a verb, of a module's name from a repository other than the one it is registered " +
+			"from, is refused naming both sources, and the module keeps its source and version",
+		Package: "./cmd/mesh-controller", Test: "TestReplay239AModuleNameIsNotTakenOverByAnotherRepository",
+		Files: []string{"cmd/mesh-controller/replay239_test.go"},
+		Home:  "mesh-controller", HomeRef: "95556b8def3f3f21e3d037617d73f97606e6ea1f"},
 }
 
 // Find is the replay of that id, or of that issue.