debug(ci): print hostname/route on auto-discover failure

- Drop 'set -euo pipefail' from the redeploy step so the auto-discovery
  loop and the diagnostic echos can run to completion even if a probe
  fails or a command returns empty output.
- On failure to find Portainer, also print the container's hostname,
  hostname -I, and ip route to stderr. This is what we'll need if the
  host-net job container approach doesn't work and we need to debug
  further.

.gitea/workflows/ci-cd.yaml

@@ -69,9 +69,10 @@ jobs:
           PORTAINER_ENDPOINT_ID: ${{ secrets.PORTAINER_ENDPOINT_ID }}
           PORTAINER_STACK_ID: ${{ secrets.PORTAINER_STACK_ID }}
         run: |
-          set -euo pipefail
-
-          echo "--- Step 0a: debug network from inside the job container ---"
+          # NOTE: no `set -e` here on purpose — the auto-discovery loop below
+          # needs to try every candidate even if some probes fail, and some
+          # diagnostic commands (ip route, hostname -I) might return empty
+          # in unusual container network setups without aborting the job.
           echo "hostname: $(hostname)"
           echo "hostname -I:"
           hostname -I 2>/dev/null || echo "(none)"
@@ -120,6 +121,8 @@ jobs:
 
           if [ -z "$PORTAINER_URL" ]; then
             echo "ERROR: no candidate URL reached Portainer. Tried: ${CANDIDATES[@]}" >&2
+            echo "ERROR: container hostname=$(hostname) IP=$(hostname -I)" >&2
+            echo "ERROR: ip route=$(ip route 2>&1 | tr '\n' ';')" >&2
             exit 1
           fi