receipts: tighten the marketplace description

At 542 characters it was the longest of the 52 internal plugins and more
than three times the median — the storefront copy sprawling for the same
reason the README did. 345 now.

Keeps what a reader needs before installing: that it reads their
transcripts, runs read-only git, sends counts and project names to write
the report, and leaves the result on their machine.

.claude-plugin/marketplace.json

@@ -2592,7 +2592,7 @@
     },
     {
       "name": "receipts",
-      "description": "Generate a personal Claude Code impact report from your local ~/.claude/projects transcripts, cross-referenced against your local git history — what you shipped, which projects it went to, and each project's share of your usage — for justifying usage to a manager or a self-review. Reads your session transcripts and runs read-only git commands in the projects they mention; mining is local and only a small aggregate summary (counts and project names) is sent to write the report, which is saved to your home directory and published nowhere.",
+      "description": "A personal Claude Code impact report for justifying your usage to a manager or a self-review: what you shipped, which projects it went to, and each project's share of your usage. Reads your ~/.claude/projects transcripts and runs read-only git locally; only counts and project names are sent to write it up, and the report stays on your machine.",
       "author": {
         "name": "Anthropic",
         "email": "support@anthropic.com"