fix: align Go-plugin :report JSON keys with bash-strip convention

Every Go-implemented plugin's `:report --format json` now emits keys without the redundant `<plugin>-` head segment, matching the shape bash plugins have always emitted. The CLI flag names and `:set` semantics are unchanged. For backwards compatibility during the 0.38.x patch series, the legacy `<plugin>-<property>` keys are emitted side-by-side with the new keys, and a future major release will drop the legacy keys. `common.ReportSingleApp` is refactored to accept a `ReportSingleAppInput` struct with a `Validate()` method so the input is checked before any work runs, which also catches the latent `"docker options"` reportType bug at the API boundary.

tests/unit/ps-general-1.bats

@@ -284,14 +284,26 @@ web
   assert_success
   assert_output ""
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"stop-timeout-seconds\"'"
+  assert_success
+  assert_output ""
+
   run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"ps-global-stop-timeout-seconds\"'"
   assert_success
   assert_output ""
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"global-stop-timeout-seconds\"'"
+  assert_success
+  assert_output ""
+
   run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"ps-computed-stop-timeout-seconds\"'"
   assert_success
   assert_output "30"
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"computed-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "30"
+
   run /bin/bash -c "dokku ps:set --global stop-timeout-seconds 90"
   assert_success
 
@@ -299,10 +311,18 @@ web
   assert_success
   assert_output "90"
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"global-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "90"
+
   run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"ps-computed-stop-timeout-seconds\"'"
   assert_success
   assert_output "90"
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"computed-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "90"
+
   run /bin/bash -c "dokku ps:set $TEST_APP stop-timeout-seconds 45"
   assert_success
 
@@ -310,6 +330,10 @@ web
   assert_success
   assert_output "45"
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"stop-timeout-seconds\"'"
+  assert_success
+  assert_output "45"
+
   run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"ps-global-stop-timeout-seconds\"'"
   assert_success
   assert_output "90"
@@ -318,6 +342,10 @@ web
   assert_success
   assert_output "45"
 
+  run /bin/bash -c "dokku ps:report $TEST_APP --format json | jq -r '.\"computed-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "45"
+
   run /bin/bash -c "dokku ps:set $TEST_APP stop-timeout-seconds"
   assert_success
 
@@ -335,18 +363,34 @@ web
   assert_success
   assert_output "true"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"global-procfile-path\")'"
+  assert_success
+  assert_output "true"
+
   run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"ps-computed-procfile-path\")'"
   assert_success
   assert_output "true"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"computed-procfile-path\")'"
+  assert_success
+  assert_output "true"
+
   run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"ps-global-stop-timeout-seconds\")'"
   assert_success
   assert_output "true"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"global-stop-timeout-seconds\")'"
+  assert_success
+  assert_output "true"
+
   run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"ps-computed-stop-timeout-seconds\")'"
   assert_success
   assert_output "true"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r 'has(\"computed-stop-timeout-seconds\")'"
+  assert_success
+  assert_output "true"
+
   run /bin/bash -c "dokku ps:set --global stop-timeout-seconds 75"
   assert_success
 
@@ -354,10 +398,18 @@ web
   assert_success
   assert_output "75"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"global-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "75"
+
   run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"ps-computed-stop-timeout-seconds\"'"
   assert_success
   assert_output "75"
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"computed-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "75"
+
   run /bin/bash -c "dokku ps:set --global stop-timeout-seconds"
   assert_success
 
@@ -365,9 +417,17 @@ web
   assert_success
   assert_output ""
 
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"global-stop-timeout-seconds\"'"
+  assert_success
+  assert_output ""
+
   run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"ps-computed-stop-timeout-seconds\"'"
   assert_success
   assert_output "30"
+
+  run /bin/bash -c "dokku ps:report --global --format json | jq -r '.\"computed-stop-timeout-seconds\"'"
+  assert_success
+  assert_output "30"
 }
 
 @test "(ps:restart-policy) default policy" {