chore: wrangler audit remediation — update compat date and add observability (#2)

Updates compatibility_date to 2026-03-16 and adds missing chittytrack
tail consumer and observability bindings per ecosystem wrangler audit.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: chitcommit

wrangler.toml

@@ -1,6 +1,6 @@
 name = "chittyauth"
 main = "worker.js"
-compatibility_date = "2024-09-23"
+compatibility_date = "2026-03-16"
 compatibility_flags = ["nodejs_compat"]
 account_id = "0bc21e3a5a9de1a4cc843be9c3e98121"  # ChittyCorp LLC main account
 
@@ -83,3 +83,9 @@ command = "npm run build"
 [build.upload]
 format = "modules"
 main = "./worker.js"
+
+[[tail_consumers]]
+service = "chittytrack"
+
+[observability]
+enabled = true