fix(fc-llm-bridge): anthropic secret key is 'password' not 'credential'

The 1Password item "Claude API Key" stores the key in a standard Password
field (labeled `password`), so the OnePasswordItem operator creates the K8s
Secret with key `password`. Deployment was referencing `credential`, which
made the pod fail with CreateContainerConfigError.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/fc-llm-bridge/fc-llm-bridge.yaml

@@ -155,7 +155,7 @@ spec:
               valueFrom:
                 secretKeyRef:
                   name: anthropic-api-key
-                  key: credential
+                  key: password
             - name: FlowerCore__Chat__Anthropic__OrganizationId
               valueFrom:
                 secretKeyRef: