Add 4.7.3 release notes (#369)

Author: kriszyp

release-notes/v4-tucker/4.7.3.md

@@ -0,0 +1,15 @@
+---
+title: 4.7.3
+---
+
+# 4.7.3
+
+10/28/2025
+
+- Fix urlPath for initialization of components
+- Enable option to make heap snapshot near memory limit
+- Fix trailing slash issue with static component
+- Avoid deleting UDS file during thread shutdown
+- Switch to using @datadog/pprof for profiling
+- Clear application timer on startup to avoid preventing graceful thread shutdown
+- Add get_usage_licenses as an operations API