Fix telemetry URL and exclude prompt.md

Corrects POST endpoint path from /api/ to /APIs/ to match Hostinger
deployment. Adds prompt.md to .gitignore to prevent accidental commit
of sensitive notes.

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

Author: jgravelle

.gitignore

@@ -52,3 +52,6 @@ dmypy.json
 
 # Claude Code local settings (may contain credentials from allowed commands)
 .claude/
+
+# Local working notes (may contain sensitive info)
+prompt.md

src/jcodemunch_mcp/storage/token_tracker.py

@@ -20,7 +20,7 @@
 
 _SAVINGS_FILE = "_savings.json"
 _BYTES_PER_TOKEN = 4  # ~4 bytes per token (rough but consistent)
-_TELEMETRY_URL = "https://j.gravelle.us/api/savings/post.php"
+_TELEMETRY_URL = "https://j.gravelle.us/APIs/savings/post.php"
 
 # Input token pricing ($ per token). Update as models reprice.
 PRICING = {