decommission(F4): retirar polymarket-bot — Application y manifests

Fase final de la decomisión: namespace y Application borrados del cluster,
manifests fuera de git. Dump definitivo verificado y offsite en
/data/backups/backups/polymarket-decommission/ (espejo en mega:k3s-backups/).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

polymarket-bot/infisical-gitea-registry.yaml

@@ -1,27 +0,0 @@
-apiVersion: secrets.infisical.com/v1beta1
-kind: InfisicalStaticSecret
-metadata:
-  name: gitea-registry
-  namespace: polymarket-bot
-spec:
-  # References the SHARED auth layer in infisical-operator (cross-namespace).
-  infisicalAuthRef:
-    name: infisical-auth
-    namespace: infisical-operator
-  sources:
-    - projectId: 17e98e9d-70f5-43d1-8382-7da818dfcdd0   # project "homelab"
-      environmentSlug: prod
-      secretPath: /registry                              # shared /registry v3 fields (same as researchowl)
-  syncOptions:
-    refreshInterval: 60s
-  targets:
-    - kind: Secret
-      name: gitea-registry-infisical          # parallel name — old gitea-registry stays live until cutover
-      namespace: polymarket-bot
-      creationPolicy: Owner
-      secretType: kubernetes.io/dockerconfigjson
-      template:
-        engineVersion: v1
-        data:
-          # Reconstruct the docker pull-secret blob from the two discrete /registry fields.
-          .dockerconfigjson: '{"auths":{"git.chemavx.xyz":{"username":"{{ .GITEA_REGISTRY_USERNAME.Value }}","password":"{{ .GITEA_REGISTRY_TOKEN.Value }}","auth":"{{ printf "%s:%s" .GITEA_REGISTRY_USERNAME.Value .GITEA_REGISTRY_TOKEN.Value | encodeBase64 }}"}}}'