feat(apps): forte-drop web + mcp ArgoCD applications

Two ArgoCD apps from the same forte-drop image:
- forte-drop (web): admin + public drops, sidecar in oidc mode,
  ingress drop-k8s.hackathon.forteapps.net.
- forte-drop-mcp (mcp): MCP-over-HTTP, sidecar in mcp mode,
  ingress mcp.drop-k8s.hackathon.forteapps.net.

Plus two labeled Keycloak client config Secrets — the registrar
creates the OIDC clients in the forte realm within ~2 min.

Sealed secrets (forte-drop-secrets + auth-oidc) added in a
follow-up commit by the maintainer:
  cd /Users/sten/dev/work/forte_k8/launchpad
  kubeseal --format=yaml \
    --controller-name=sealed-secrets-controller \
    --controller-namespace=kube-system \
    < private/forte-drop-secrets.yaml \
    > apps/base/forte-drop/forte-drop-secrets-sealed.yaml
  # auth-oidc: wait for registrar, copy client-secret into private/,
  # then seal as apps/base/forte-drop/auth-oidc-sealed.yaml.
  # (mcp deployment is sidecar type=mcp — no auth-oidc Secret needed;
  # only the web deployment requires it.)

apps/base/forte-drop-mcp/forte-drop-mcp.yaml

@@ -0,0 +1,37 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: forte-drop-mcp
+  namespace: argocd
+  annotations:
+    argocd.argoproj.io/sync-wave: "1"
+    notifications.argoproj.io/subscribe.on-sync-succeeded.slack: ""
+    notifications.argoproj.io/subscribe.on-sync-failed.slack: ""
+    notifications.argoproj.io/subscribe.on-degraded.slack: ""
+  labels:
+    app.kubernetes.io/name: forte-drop-mcp
+    app.kubernetes.io/part-of: apps
+    app.kubernetes.io/managed-by: argocd
+  finalizers:
+  - resources-finalizer.argocd.argoproj.io
+spec:
+  project: default
+  sources:
+  - repoURL: ssh://git@git.forteapps.net:2222/Forte/forte-helm.git
+    path: forteapp
+    targetRevision: HEAD
+    helm:
+      valueFiles:
+      - $values/forte-drop-mcp/values.yaml
+  - repoURL: ssh://git@git.forteapps.net:2222/Forte/helm-prod-values.git
+    targetRevision: HEAD
+    ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: forte-drop
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+    - CreateNamespace=true