Maintain watched file names for CLI collision checks

Share the CLI watcher with a reconciled name inventory, observe local
mutations, and retain newer notifications across overlapping reads.
Adopt the shared index for Obsidian and preserve fresh bulk operations.

src/apps/cli/storage/CLIFileNameSource.paths.unit.spec.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from "vitest";
+import type { DirectoryEntry } from "@vrtmrz/livesync-commonlib/storage";
+import { findInvalidatedDirectoryScopes } from "./CLIFileNameSource.paths";
+
+describe("physical directory scopes for invalidation", () => {
+    it.each([true, false])(
+        "retains every Legacy parent admitted by the effective case policy (sensitive: %s)",
+        (sensitive) => {
+            const directories = new Map<string, readonly DirectoryEntry[]>([
+                [
+                    "",
+                    [
+                        { name: "Docs", kind: "directory" },
+                        { name: "docs", kind: "directory" },
+                        { name: "other", kind: "directory" },
+                    ],
+                ],
+                ["Docs", []],
+                ["docs", []],
+                ["other", []],
+            ]);
+            const scopes = findInvalidatedDirectoryScopes(directories, "docs", {
+                pathNormalizationVersion: 0,
+                handleFilenameCaseSensitive: sensitive,
+            });
+            expect([...scopes].sort()).toEqual(sensitive ? ["docs"] : ["Docs", "docs"]);
+        }
+    );
+});