fix(e2e/ui): fail the run when the Presidio fixture never comes up

Both readiness loops broke out on success and fell through on timeout, so a
mock Presidio server that failed to bind left the run going with nothing
serving /analyze. The guardrail then errored at request time and the failure
surfaced as an unrelated Playwright assertion in presidioUserStory.spec.ts
rather than as the missing fixture it actually was.

Fail the local runner with the port in the message, and add the matching wait
step to both CircleCI UI jobs, which had no readiness check at all.

.circleci/config.yml

@@ -2652,6 +2652,15 @@ jobs:
           name: Start mock Presidio server
           command: uv run --no-sync python tests/e2e/ui/fixtures/mock_presidio_server/server.py
           background: true
+      - run:
+          name: Wait for mock Presidio server
+          command: |
+            for i in $(seq 1 30); do
+              if curl -sf http://127.0.0.1:8091/health >/dev/null 2>&1; then exit 0; fi
+              sleep 1
+            done
+            echo "Mock Presidio server never answered /health on port 8091" >&2
+            exit 1
       - run:
           name: Start LiteLLM proxy
           environment:
@@ -2786,6 +2795,15 @@ jobs:
           name: Start mock Presidio server
           command: uv run --no-sync python tests/e2e/ui/fixtures/mock_presidio_server/server.py
           background: true
+      - run:
+          name: Wait for mock Presidio server
+          command: |
+            for i in $(seq 1 30); do
+              if curl -sf http://127.0.0.1:8091/health >/dev/null 2>&1; then exit 0; fi
+              sleep 1
+            done
+            echo "Mock Presidio server never answered /health on port 8091" >&2
+            exit 1
       - run:
           name: Start LiteLLM proxy under a server root path
           environment:

tests/e2e/ui/run_e2e.sh

@@ -212,10 +212,15 @@ echo "=== Starting mock Presidio server ==="
 uv run --no-sync python "$SCRIPT_DIR/fixtures/mock_presidio_server/server.py" &
 MOCK_PRESIDIO_PID=$!
 
+PRESIDIO_READY=0
 for i in $(seq 1 15); do
-  if curl -sf http://127.0.0.1:${MOCK_PRESIDIO_PORT}/health >/dev/null 2>&1; then break; fi
+  if curl -sf http://127.0.0.1:${MOCK_PRESIDIO_PORT}/health >/dev/null 2>&1; then PRESIDIO_READY=1; break; fi
   sleep 1
 done
+if [ "$PRESIDIO_READY" -ne 1 ]; then
+  echo "Mock Presidio server never answered /health on port ${MOCK_PRESIDIO_PORT}" >&2
+  exit 1
+fi
 
 # --- LiteLLM proxy ---
 echo "=== Starting LiteLLM proxy ==="