docs: update Claude Code releases to v2.1.59

- v2.1.59: auto-memory (/memory), /copy command picker, smarter compound bash prefixes, MCP OAuth race condition fix, config corruption fix
- v2.1.58: Remote Control expanded to more users

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

machine-readable/claude-code-releases.yaml

@@ -3,8 +3,8 @@
 # Purpose: Track Claude Code product releases for documentation sync
 # Maintained: Manual updates when new releases are announced
 
-latest: "2.1.56"
-updated: "2026-02-25"
+latest: "2.1.59"
+updated: "2026-02-26"
 
 # ════════════════════════════════════════════════════════════════
 # RELEASES (newest first, condensed highlights only)
@@ -15,6 +15,22 @@ releases:
   # 2.1.x Series (January-February 2026)
   # ─────────────────────────────────────────────────────────────
 
+  - version: "2.1.59"
+    date: "2026-02-26"
+    highlights:
+      - "⭐ Auto-memory: Claude automatically saves useful context; manage with /memory"
+      - "⭐ /copy command: interactive picker for selecting individual code blocks or full response"
+      - "Smarter 'always allow' prefix suggestions for compound bash commands (per-subcommand prefixes)"
+      - "Fixed MCP OAuth token refresh race condition with multiple simultaneous instances"
+      - "Fixed config file corruption wiping authentication when multiple instances ran simultaneously"
+    breaking: []
+
+  - version: "2.1.58"
+    date: "2026-02-26"
+    highlights:
+      - "Remote Control expanded to more users"
+    breaking: []
+
   - version: "2.1.56"
     date: "2026-02-25"
     highlights: