chore: disable issue enrichment in coderabbit

* feat: add support for 'envoy' proxy in proxyHandler validation

* refactor: simplify proxy route setup by consolidating envoy handling

* feat(proxy): add method validation for proxy authentication

* fix(proxy): reorder method validation for proxy authentication

* refactor: use a slice to check for supported proxies

---------

Co-authored-by: pushpinderbal <me@s1ngh.ca>
Co-authored-by: Pushpinder Singh <53684951+pushpinderbal@users.noreply.github.com>
Co-authored-by: Pushpinder Singh <pushpinder.singh@arcticwolf.com>

.coderabbit.yaml

@@ -0,0 +1,3 @@
+issue_enrichment:
+  auto_enrich:
+    enabled: false