test: review round 2 of Issue #71 (line breaks, unreadable registry, shim anchor)

- parity and create with real line breaks in the name;
- stop with malformed YAML (no DB) or a corrupt DB refuses (exit 1);
- test_layout: the shim heredoc anchor follows the { ... } > "$tmp_file"
  form (the rule it checks is unchanged);
- S11: base re-pinned to 0fc162e, which changes the shim's sanitize body.

Refs #71

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_layout.py

@@ -239,7 +239,8 @@ def test_lib_sh_no_local_in_shim_heredoc():
     with open(lib_path, "r", encoding="utf-8") as f:
         content = f.read()
 
-    start_idx = content.find("cat <<'EOF' > \"$tmp_file\"")
+    # Issue #71: the shim is written as { printf ...; declare -f ...; cat <<'EOF' ... } > "$tmp_file"
+    start_idx = content.find("cat <<'EOF'\n")
     end_idx = content.find("\nEOF\n", start_idx)
     assert start_idx != -1 and end_idx != -1