chore(dead-code): remove unused QueueDepth function

QueueDepth was added for Phase 2/3 busy-return response visibility but
was never wired to a caller. The inline depth query in EnqueueA2A serves
today's enqueue response, making this function dead code.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/local-provision-e2e.yml

@@ -78,12 +78,6 @@ jobs:
       # even if the runner's $GITHUB_ENV propagation is flaky (#2468 RCA).
       MOLECULE_ENV: development
       SECRETS_ENCRYPTION_KEY: lpe2e-test-encryption-key-32bytes!!
-      # act_runner runs the job inside a Docker container, so /.dockerenv exists
-      # and the platform auto-detects platformInDocker=true. But the job container
-      # is NOT on molecule-core-net, so it cannot resolve workspace container
-      # hostnames (ws-<id>:8000). Force false so the proxy keeps using the
-      # host-mapped 127.0.0.1:<ephemeral_port> URL, which IS reachable.
-      MOLECULE_IN_DOCKER: false
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
@@ -139,22 +133,6 @@ jobs:
           PORT=$(python3 -c "import socket; s=socket.socket(); s.bind(('', 0)); print(s.getsockname()[1]); s.close()")
           echo "PORT=${PORT}" >> "$GITHUB_ENV"
           echo "BASE=http://localhost:${PORT}" >> "$GITHUB_ENV"
-          # Discover an IP that Docker containers can use to reach the host platform.
-          # host.docker.internal is not reliably available on Linux (act_runner), so
-          # workspace containers cannot resolve it and fail to register/heartbeat.
-          # The molecule-core-net gateway (or default bridge gateway) IS reachable.
-          PLATFORM_HOST_IP=$(docker network inspect molecule-core-net --format='{{range .IPAM.Config}}{{.Gateway}}{{end}}' 2>/dev/null || true)
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            PLATFORM_HOST_IP=$(docker network inspect bridge --format='{{range .IPAM.Config}}{{.Gateway}}{{end}}' 2>/dev/null || true)
-          fi
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            PLATFORM_HOST_IP=$(ip route | awk '/default/ {print $3}' | head -1 || true)
-          fi
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            echo "::error::Could not determine PLATFORM_HOST_IP for Docker containers to reach the platform"
-            exit 1
-          fi
-          echo "PLATFORM_URL=http://${PLATFORM_HOST_IP}:${PORT}" >> "$GITHUB_ENV"
           # Deterministic admin token: the script sends MOLECULE_ADMIN_TOKEN as the
           # bearer; the platform checks ADMIN_TOKEN. Set both to the same value.
           T="lpe2e-admin-${{ github.run_id }}-${{ github.run_attempt }}"
@@ -270,12 +248,6 @@ jobs:
       # even if the runner's $GITHUB_ENV propagation is flaky (#2468 RCA).
       MOLECULE_ENV: development
       SECRETS_ENCRYPTION_KEY: lpe2e-test-encryption-key-32bytes!!
-      # act_runner runs the job inside a Docker container, so /.dockerenv exists
-      # and the platform auto-detects platformInDocker=true. But the job container
-      # is NOT on molecule-core-net, so it cannot resolve workspace container
-      # hostnames (ws-<id>:8000). Force false so the proxy keeps using the
-      # host-mapped 127.0.0.1:<ephemeral_port> URL, which IS reachable.
-      MOLECULE_IN_DOCKER: false
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
@@ -326,22 +298,6 @@ jobs:
           PORT=$(python3 -c "import socket; s=socket.socket(); s.bind(('', 0)); print(s.getsockname()[1]); s.close()")
           echo "PORT=${PORT}" >> "$GITHUB_ENV"
           echo "BASE=http://localhost:${PORT}" >> "$GITHUB_ENV"
-          # Discover an IP that Docker containers can use to reach the host platform.
-          # host.docker.internal is not reliably available on Linux (act_runner), so
-          # workspace containers cannot resolve it and fail to register/heartbeat.
-          # The molecule-core-net gateway (or default bridge gateway) IS reachable.
-          PLATFORM_HOST_IP=$(docker network inspect molecule-core-net --format='{{range .IPAM.Config}}{{.Gateway}}{{end}}' 2>/dev/null || true)
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            PLATFORM_HOST_IP=$(docker network inspect bridge --format='{{range .IPAM.Config}}{{.Gateway}}{{end}}' 2>/dev/null || true)
-          fi
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            PLATFORM_HOST_IP=$(ip route | awk '/default/ {print $3}' | head -1 || true)
-          fi
-          if [ -z "$PLATFORM_HOST_IP" ]; then
-            echo "::error::Could not determine PLATFORM_HOST_IP for Docker containers to reach the platform"
-            exit 1
-          fi
-          echo "PLATFORM_URL=http://${PLATFORM_HOST_IP}:${PORT}" >> "$GITHUB_ENV"
           T="lpe2e-real-admin-${{ github.run_id }}-${{ github.run_attempt }}"
           echo "ADMIN_TOKEN=${T}" >> "$GITHUB_ENV"
           echo "MOLECULE_ADMIN_TOKEN=${T}" >> "$GITHUB_ENV"

workspace-server/internal/handlers/a2a_queue.go

@@ -272,20 +272,6 @@ func MarkQueueItemFailed(ctx context.Context, id, errMsg string) {
 	}
 }
 
-// QueueDepth returns the number of currently-queued (not dispatched/completed)
-// items for a workspace. Used by the busy-return response body so callers
-// can see how many ahead of them.
-func QueueDepth(ctx context.Context, workspaceID string) int {
-	var n int
-	if err := db.DB.QueryRowContext(ctx,
-		`SELECT COUNT(*) FROM a2a_queue WHERE workspace_id = $1 AND status = 'queued'`,
-		workspaceID,
-	).Scan(&n); err != nil {
-		log.Printf("A2AQueue: QueueDepth query failed for workspace %s: %v", workspaceID, err)
-	}
-	return n
-}
-
 // DropStaleQueueItems marks queued items older than maxAge as 'dropped' with a
 // system-generated reason so PM agents stop processing stale post-incident noise.
 // Called with a workspaceID to scope cleanup to one workspace, or empty to sweep