test: backfill raw/global/computed report triplet coverage across plugins

The bats coverage for plugin :report keys has been uneven since the raw/global/computed split landed in PR #8640. This commit adds a single combined triplet test per settable property across app-json, builder, builder-dockerfile, builder-herokuish, builder-lambda, builder-nixpacks, builder-pack, builder-railpack, buildpacks, cron (maintenance), git (keep-git-dir, rev-env-var, source-image), logs (vector-sink, vector-global-image, vector-global-networks), network (attach-post-create, attach-post-deploy, initial-network), proxy (per-app type), ps (stop-timeout-seconds), registry (image-repo, push-on-release, push-extra-tags), storage (build/deploy/run mounts), and adds a new tests/unit/scheduler.bats and tests/unit/nginx-vhosts_properties.bats. Brings ps `procfile-path` and `stop-timeout-seconds` global getters in line with the #8640 convention (raw global, default resolved in computed). Documents the read-only and internal properties that surface in `:report` (or are written by Dokku) but cannot be managed by `:set` in a new `## Internal properties` section appended to each affected plugin's docs page.

tests/unit/network.bats

@@ -107,6 +107,100 @@ teardown() {
   assert_success
 }
 
+@test "(network:report) attach-post-create raw vs computed vs global" {
+  docker network create create-network-x >/dev/null
+  run /bin/bash -c "dokku network:set --global attach-post-create"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-attach-post-create\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-attach-post-create\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-computed-attach-post-create\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku network:set --global attach-post-create create-network-x"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-attach-post-create\"'"
+  assert_success
+  assert_output "create-network-x"
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-computed-attach-post-create\"'"
+  assert_success
+  assert_output "create-network-x"
+
+  run /bin/bash -c "dokku network:set --global attach-post-create"
+  assert_success
+
+  docker network rm create-network-x >/dev/null
+}
+
+@test "(network:report) attach-post-deploy raw vs computed vs global" {
+  docker network create deploy-network-x >/dev/null
+  run /bin/bash -c "dokku network:set --global attach-post-deploy"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-attach-post-deploy\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-attach-post-deploy\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku network:set --global attach-post-deploy deploy-network-x"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-attach-post-deploy\"'"
+  assert_success
+  assert_output "deploy-network-x"
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-computed-attach-post-deploy\"'"
+  assert_success
+  assert_output "deploy-network-x"
+
+  run /bin/bash -c "dokku network:set --global attach-post-deploy"
+  assert_success
+
+  docker network rm deploy-network-x >/dev/null
+}
+
+@test "(network:report) initial-network raw vs computed vs global" {
+  docker network create initial-network-x >/dev/null
+  run /bin/bash -c "dokku network:set --global initial-network"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-initial-network\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-initial-network\"'"
+  assert_success
+  assert_output ""
+
+  run /bin/bash -c "dokku network:set --global initial-network initial-network-x"
+  assert_success
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-global-initial-network\"'"
+  assert_success
+  assert_output "initial-network-x"
+
+  run /bin/bash -c "dokku --quiet network:report $TEST_APP --format json | jq -r '.\"network-computed-initial-network\"'"
+  assert_success
+  assert_output "initial-network-x"
+
+  run /bin/bash -c "dokku network:set --global initial-network"
+  assert_success
+
+  docker network rm initial-network-x >/dev/null
+}
+
 @test "(network) network:set bind-all-interfaces" {
   run deploy_app
   echo "output: $output"