fix: restore orElseSucceed on exists in config discovery to avoid aborting parent walk

When fileSystem.exists fails (e.g. permission denied), treat it as 'not found'
instead of throwing VcsProjectConfigError, so the upward directory walk continues
and can still find a valid .t3code/vcs.json in a parent directory.

Author: cursoragent

apps/server/src/vcs/VcsProjectConfig.ts

@@ -62,17 +62,7 @@ export const make = Effect.gen(function* () {
     let current = cwd;
     while (true) {
       const candidate = path.join(current, ".t3code", "vcs.json");
-      const exists = yield* fileSystem.exists(candidate).pipe(
-        Effect.mapError(
-          (cause) =>
-            new VcsProjectConfigError({
-              operation: "inspect",
-              cwd,
-              configPath: candidate,
-              cause,
-            }),
-        ),
-      );
+      const exists = yield* fileSystem.exists(candidate).pipe(Effect.orElseSucceed(() => false));
       if (exists) {
         return Option.some(candidate);
       }