chore(den): remove legacy den v1 service artifacts (#1005)

Retire the legacy services/den implementation and related disabled deploy workflows so Den v2 is the only maintained service path.

.github/workflows/deploy-den-v2.yml

@@ -1,19 +0,0 @@
-# Deploy Den v2 workflow intentionally disabled.
-#
-# Render is responsible for building and deploying the Daytona-first Den v2
-# control plane, so this repository workflow should not trigger deploys or
-# mutate Render environment configuration.
-
-name: Deploy Den v2 (disabled)
-
-on:
-  workflow_dispatch:
-
-jobs:
-  disabled:
-    if: false
-    runs-on: ubuntu-latest
-    steps:
-      - name: Disabled
-        run: |
-          echo "deploy-den-v2.yml is intentionally disabled; Render handles Den v2 deploys"

.github/workflows/deploy-den.yml

@@ -1,18 +0,0 @@
-# Deploy Den workflow intentionally disabled.
-#
-# Render is responsible for building and deploying the legacy Den service,
-# so this repository workflow should not trigger any deploy automation.
-
-name: Deploy Den (disabled)
-
-on:
-  workflow_dispatch:
-
-jobs:
-  disabled:
-    if: false
-    runs-on: ubuntu-latest
-    steps:
-      - name: Disabled
-        run: |
-          echo "deploy-den.yml is intentionally disabled; Render handles Den deploys"