feat: attach vector container to additional docker networks

Adds a new global `vector-networks` property on the logs plugin that takes a comma-separated list of Docker networks. When set, the rendered compose file declares each network plus `bridge` as external and joins them on the vector service, so `docker compose up` reconciles attachments on every `logs:vector-start`. When unset, the existing `network_mode: bridge` template is preserved unchanged. The value is validated against `docker network inspect` at set time, rejects the reserved `bridge` entry, and is surfaced in `dokku logs:report` via `--logs-vector-global-networks`.

tests/unit/logs.bats

@@ -9,6 +9,8 @@ setup() {
 
 teardown() {
   destroy_app
+  docker network rm test-vector-net-a >/dev/null || true
+  docker network rm test-vector-net-b >/dev/null || true
   global_teardown
 }
 
@@ -54,7 +56,7 @@ teardown() {
   echo "status: $status"
   assert_failure
   assert_output_contains "$TEST_APP logs information" 0
-  assert_output_contains "Invalid flag passed, valid flags: --logs-app-label-alias, --logs-computed-app-label-alias, --logs-computed-max-size, --logs-global-app-label-alias, --logs-global-max-size, --logs-global-vector-sink, --logs-max-size, --logs-vector-global-image, --logs-vector-sink"
+  assert_output_contains "Invalid flag passed, valid flags: --logs-app-label-alias, --logs-computed-app-label-alias, --logs-computed-max-size, --logs-global-app-label-alias, --logs-global-max-size, --logs-global-vector-sink, --logs-max-size, --logs-vector-global-image, --logs-vector-global-networks, --logs-vector-sink"
 
   run /bin/bash -c "dokku logs:report $TEST_APP --logs-vector-sink 2>&1"
   echo "output: $output"
@@ -458,6 +460,143 @@ teardown() {
   assert_output "10m"
 }
 
+@test "(logs) logs:set --global vector-networks" {
+  docker network create test-vector-net-a >/dev/null
+  docker network create test-vector-net-b >/dev/null
+
+  run create_app
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku logs:set $TEST_APP vector-networks test-vector-net-a 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+
+  run /bin/bash -c "dokku logs:set --global vector-networks does-not-exist 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+  assert_output_contains "Network \"does-not-exist\" does not exist"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks bridge 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+  assert_output_contains "\"bridge\" is attached by default and must not be listed"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks 'test-vector-net-a,'  2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+  assert_output_contains "empty entry in comma-separated list"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks test-vector-net-a 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Setting vector-networks"
+
+  run /bin/bash -c "dokku logs:report --global --logs-vector-global-networks 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output "test-vector-net-a"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks test-vector-net-a,test-vector-net-b 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Setting vector-networks"
+
+  run /bin/bash -c "dokku logs:report --global --logs-vector-global-networks 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output "test-vector-net-a,test-vector-net-b"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Unsetting vector-networks"
+
+  run /bin/bash -c "dokku logs:report --global --logs-vector-global-networks 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_not_exists
+}
+
+@test "(logs) logs:vector-start attaches configured networks" {
+  docker network create test-vector-net-a >/dev/null
+  docker network create test-vector-net-b >/dev/null
+
+  run /bin/bash -c "dokku logs:set --global vector-networks test-vector-net-a,test-vector-net-b 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku logs:vector-start 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Vector container is running"
+
+  run /bin/bash -c "sudo docker inspect --format='{{range \$k, \$v := .NetworkSettings.Networks}}{{\$k}} {{end}}' vector-vector-1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "bridge"
+  assert_output_contains "test-vector-net-a"
+  assert_output_contains "test-vector-net-b"
+
+  run /bin/bash -c "dokku logs:vector-stop 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku logs:vector-start 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "Vector container is running"
+
+  run /bin/bash -c "sudo docker inspect --format='{{range \$k, \$v := .NetworkSettings.Networks}}{{\$k}} {{end}}' vector-vector-1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "test-vector-net-a"
+  assert_output_contains "test-vector-net-b"
+
+  run /bin/bash -c "dokku logs:set --global vector-networks 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku logs:vector-stop 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku logs:vector-start 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "sudo docker inspect --format='{{range \$k, \$v := .NetworkSettings.Networks}}{{\$k}} {{end}}' vector-vector-1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "bridge"
+
+  run /bin/bash -c "dokku logs:vector-stop 2>&1"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+}
+
 @test "(logs) logs:set app-label-alias" {
   run create_app
   echo "output: $output"