Docs: commit basic-memory frontmatter backfill + resolved MCP lock hash

The 13 vault notes were left dirty by basic-memory back-filling
title/type/permalink frontmatter into files written with Write/Edit
(it also strips the trailing newline — restored here so future diffs
stay clean). Content is unchanged; verified frontmatter-only.

packages-lock.json is the com.coplaydev.unity-mcp #main branch ref
silently re-resolving. Pinning that dependency lands with the package
cleanup batch.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Docs/Vault/07_Sessions/2026/2026-07-20_Target_Dummy_D.md

@@ -1,3 +1,9 @@
+---
+title: 2026-07-20_Target_Dummy_D
+type: note
+permalink: gamevault/07-sessions/2026/2026-07-20-target-dummy-d
+---
+
 # 2026-07-20 (D) — Sandbox target dummy (planted combat-test target)
 
 **Operator:** enemies don't work in the DevSandbox — replace with a target dummy for combat testing.