fix(mcp-registry): shorten server.json description to <=100 chars

The official MCP registry rejected the publish (422: expected length <= 100 on
body.description). Trimmed to an honest 92-char teaser ('Ranked local code-graph
context for AI coding agents. Intercepts reads + greps. Apache-2.0.') — drops the
length, keeps the differentiators, no cost claim. The full detail stays in the
README. Re-run mcp-publisher publish to replace the stale v3.0.2 '89.1% saved'
registry record.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: NickCirv

server.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
   "name": "io.github.NickCirv/engram",
-  "description": "Ranked local code-graph context for AI coding tools — intercepts file reads, symbol greps, and re-reads. Works in 8 IDEs. Up to ~89% structural context reduction (varies by repo). Local SQLite, zero cloud, Apache 2.0.",
+  "description": "Ranked local code-graph context for AI coding agents. Intercepts reads + greps. Apache-2.0.",
   "repository": {
     "url": "https://github.com/NickCirv/engram",
     "source": "github"