fix(fs-search): keep broad glob samples representative

Remove the duplicate model-facing list tool from this branch; directory orientation remains available through bash ls. Keep the glob sampling fix, add a real ACP composition snapshot, and narrow the decision record to the shipped bug fix.

examples/acp-agent/tests/fixtures/fs-search-bin/rg

@@ -0,0 +1,8 @@
+#!/bin/sh
+printf '%s\n' \
+  'archive/a.ts' \
+  'archive/b.ts' \
+  'archive/c.ts' \
+  'src/index.ts' \
+  'docs/guide.md' \
+  'test/spec.ts'