feat(gitea): add Helm values with right-sized PGPool CPU request

PGPool default 250m CPU request was causing scheduling failures on the
single-node COULOMBCORE cluster (2 vCPU, 98% allocated). Reduced to
100m request / 200m limit — safe for a lightweight connection pooler.
See INC-001: the-custodian/ops/incidents/2026-03-25-gitea-pgpool-crashloop.md

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

releases/gitea/values.yaml

@@ -0,0 +1,20 @@
+# Gitea Helm values — COULOMBCORE cluster
+# Chart: gitea/gitea  version: 12.5.0
+# Release name: gitea  namespace: default
+#
+# Applied via:
+#   helm upgrade gitea gitea/gitea --version 12.5.0 -n default -f releases/gitea/values.yaml
+
+postgresql-ha:
+  pgpool:
+    adminPassword: changeme4   # TODO: move to sealed secret / external secret
+
+    # Right-sized for single-node COULOMBCORE (2 vCPU budget is tight).
+    # Default was 250m request which caused scheduling failures — see INC-001.
+    resources:
+      requests:
+        cpu: 100m
+        memory: 256Mi
+      limits:
+        cpu: 200m
+        memory: 384Mi