feat: port vhost proxy :report subcommands to golang

The bash :report implementations for the caddy, haproxy, openresty, and traefik proxy plugins are replaced with a compiled golang binary that collects report keys in parallel and marshals json directly. The traefik dns-provider values keep their masking behaviour, remaining hidden in the default stdout report while surfacing for --format json or an explicit flag query. These four plugins previously had no unit tests, so a bats suite covering the report matrix is added for each.

tests/unit/caddy-vhosts.bats

@@ -0,0 +1,84 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  create_app
+}
+
+teardown() {
+  destroy_app
+  dokku caddy:set --global log-level >/dev/null 2>&1 || true
+  dokku caddy:set --global tls-internal >/dev/null 2>&1 || true
+}
+
+@test "(caddy:report) info-flag works before deploy" {
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-computed-tls-internal"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output "false"
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-invalid-flag"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+  assert_output_contains "Invalid flag passed"
+}
+
+@test "(caddy:report) --format json" {
+  run /bin/bash -c "dokku caddy:set --global log-level"
+  assert_success
+
+  run /bin/bash -c "dokku caddy:report --global --format json | jq -e ."
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku caddy:report --global --format json | jq -r '.\"computed-log-level\"'"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output "ERROR"
+
+  run /bin/bash -c "dokku caddy:report --global"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_contains "global caddy information"
+}
+
+@test "(caddy:report) tls-internal raw global computed" {
+  run /bin/bash -c "dokku caddy:set --global tls-internal"
+  assert_success
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-tls-internal"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-computed-tls-internal"
+  assert_success
+  assert_output "false"
+
+  run /bin/bash -c "dokku caddy:set --global tls-internal true"
+  assert_success
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-global-tls-internal"
+  assert_success
+  assert_output "true"
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-computed-tls-internal"
+  assert_success
+  assert_output "true"
+
+  run /bin/bash -c "dokku caddy:set $TEST_APP tls-internal false"
+  assert_success
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-tls-internal"
+  assert_success
+  assert_output "false"
+
+  run /bin/bash -c "dokku caddy:report $TEST_APP --caddy-computed-tls-internal"
+  assert_success
+  assert_output "false"
+}