chore: configure Codecov to be informational only

Set both project and patch coverage status checks to informational mode. This prevents Codecov from blocking PRs while still providing coverage insights. Allows coverage to fluctuate by up to 10% (project) and 50% (patch) without failing.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: fullstackjam

codecov.yml

@@ -0,0 +1,17 @@
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 10%
+        informational: true
+    patch:
+      default:
+        target: auto
+        threshold: 50%
+        informational: true
+
+comment:
+  layout: "reach,diff,flags,tree"
+  behavior: default
+  require_changes: false