fix(tests): green the integration doctype suite after widget-reconciliation

The `test-integration` suite (TestMxCheck_DoctypeScripts) started failing once
the multi-version pluggable-widget reconciliation landed. Two showcase scripts
regressed — both because reconciliation stopped masking genuine widget
incompleteness, not because of a defect in the generated BSON:

32-pluggable-widget-object-lists-v010.mdl (modelsdk): the OL09 HeatMap only set
its SCALECOLOR entries and never bound a data series, so mx check reported
CE0642 "Property 'Series'/'Value attribute' is required". Reconciling the
HeatMap definition to the installed .mpk correctly marks those required (the old
embedded template understated it). Complete the example with the widget-level
DataSource / HorizontalAxisAttribute / VerticalAxisAttribute / ValueAttribute
binding, mirroring the passing HeatMap in 34-chart-widget-examples.mdl — the
object-list showcase now demonstrates a complete, deployable heat map.

17-custom-widget-examples.mdl (both engines): the IMAGE showcases author
bare/default static-image-mode Image widgets to demonstrate the IMAGE keyword's
basic/dimensions/onclick syntax. MDL exposes no property to bind a static image
resource (only imageUrl mode), so a default Image is legitimately
"No image selected." — exactly what a freshly-dropped Image shows in Studio Pro.
It previously passed only because a stale Atlas_Core.Content.Mendix template
default masked it; that default caused CE0463 and was removed in the Image
CE0463 fix. Whitelist the message for this script via scriptKnownCEErrors
(now documented to also accept a message substring where an error carries no CE
code), matching the existing syntax-showcase-limitation pattern.

Verified on Mendix 11.12.1: all three previously-failing subtests pass; mendixlabs#32
retains only the globally-tolerated Maps CE0463.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JXnEgoc2NQP1Y2TWMCMXC4

Author: claude

mdl-examples/doctype-tests/32-pluggable-widget-object-lists-v010.mdl

@@ -385,6 +385,12 @@ create page ObjListV10.P_OL08_LineChart (
 -- HeatMap's `scaleColors` object-list → the SCALECOLOR keyword. Each entry maps
 -- a value percentage to a colour; `ColorValue:` fills the schema's `colour`
 -- primitive (British spelling — the alias keeps the friendly MDL name).
+--
+-- HeatMap binds its data at the WIDGET level (no `series` object-list): the
+-- `DataSource:` + `ValueAttribute:` fill the schema's `Series`/`Value attribute`
+-- (both required — CE0642 without them), and `HorizontalAxisAttribute:` /
+-- `VerticalAxisAttribute:` pick the two category axes. The SCALECOLOR entries
+-- then layer the colour scale over that grid.
 
 create page ObjListV10.P_OL09_HeatMap (
   Title: 'Sales Heat Map',
@@ -394,7 +400,12 @@ create page ObjListV10.P_OL09_HeatMap (
   layoutgrid lg1 {
     row r1 {
       column c1 (DesktopWidth: 12) {
-        pluggablewidget 'com.mendix.widget.web.heatmap.HeatMap' heatMap1 {
+        pluggablewidget 'com.mendix.widget.web.heatmap.HeatMap' heatMap1 (
+          DataSource: database from ObjListV10.SalesData,
+          HorizontalAxisAttribute: Region,
+          VerticalAxisAttribute: PeriodLabel,
+          ValueAttribute: RevenueValue
+        ) {
           scalecolor scLow (ValuePercentage: 0, ColorValue: '#f7fbff')
           scalecolor scHigh (ValuePercentage: 100, ColorValue: '#08306b')
         }

mdl/executor/roundtrip_doctype_test.go

@@ -117,16 +117,30 @@ var scriptModuleDeps = map[string][]moduleDep{
 // not actionable on this branch.
 var scriptSkipList = map[string]string{}
 
-// scriptKnownCEErrors lists CE error codes that are expected for specific scripts.
-// These are syntax showcase scripts that intentionally omit entities, constants,
-// headers etc. that full validation requires.
+// scriptKnownCEErrors lists CE error codes (or, where an error carries no CE
+// code, a distinctive substring of its message) that are expected for specific
+// scripts. These are syntax showcase scripts that intentionally omit entities,
+// constants, headers etc. that full validation requires. Matched by substring
+// against each `[error]` line (see allErrorsKnown).
 var scriptKnownCEErrors = map[string][]string{
 	"03-page-examples.mdl": {
 		"CE3637", // Data view listen to gallery in sibling layout-grid column — Mendix scoping limitation
 	},
 	"06b-soap-examples.mdl": {
 		"CE1613", // Dangling service/mapping refs — no web service defined in the test project
 	},
+	"17-custom-widget-examples.mdl": {
+		// The IMAGE showcases author bare/default (static-image-mode) Image
+		// widgets to demonstrate the IMAGE keyword's basic/dimensions/onclick
+		// syntax. MDL's image widget exposes no property to bind a static image
+		// resource (only imageUrl mode), so a default Image is legitimately
+		// "No image selected." — exactly what a freshly-dropped Image shows in
+		// Studio Pro until you pick one. Not an mxcli defect: the widget BSON is
+		// valid. It previously passed only because a stale
+		// `Atlas_Core.Content.Mendix` template default masked it — that default
+		// caused CE0463 and was removed in the Image CE0463 fix (549c44f).
+		"No image selected.",
+	},
 }
 
 // TestMxCheck_DoctypeScripts executes each doctype-tests/*.mdl example script