chore: stage forgotten .mcp.json deletion + bump pumpingStation pin

Two trailing items the prior commits missed:

- .mcp.json was rm'd from the working tree in commit d4e72f2 (repo-mem
  cleanup) but never staged for deletion; git status kept showing
  ' D .mcp.json' as a result. Properly removed now.
- nodes/pumpingStation pin bumps to pull in the wiki-gen regen commit
  that kept Reference-Contracts.md in sync with the tool's canonical
  output.

User WIP intentionally not touched: examples/README.md zeroed-out,
examples/pumpingstation-complete-example/* removed, and
nodes/rotatingMachine working-tree change to rotatingMachine.html.
Those belong to the user; the harness only re-flagged them.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.mcp.json

@@ -1,14 +0,0 @@
-{
-  "mcpServers": {
-    "repo-mem": {
-      "type": "stdio",
-      "command": "node",
-      "args": [
-        "/home/znetsixe/anchor-net-master/tools/repo-mem/server.mjs",
-        "--in",
-        "/home/znetsixe/EVOLV/.repo-mem"
-      ],
-      "env": {}
-    }
-  }
-}