fix: lower VIEW ENTITY version gate from 11.0+ to 10.18+

Now that the writer includes the inline Oql field for 10.x projects,
VIEW ENTITY works on Mendix 10.18+ (when it was introduced).

- Lower @Version gates in 01-domain-model-examples.mdl from 11.0+ to 10.18+
- Lower requireMinVersion in view entity mxcheck tests from 11.0 to 10.18
- Update version-compatibility docs to reflect working 10.x support

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ako

docs-site/src/appendixes/version-compatibility.md

@@ -63,7 +63,7 @@ These features use BSON structures that changed in Mendix 11.0 and are **not com
 
 | Feature | Minimum Version | Error on 10.x |
 |---------|----------------|---------------|
-| View entities (CREATE VIEW ENTITY) | 11.0 | CE6775: "A view entity requires an OQL query" |
+| View entities (CREATE VIEW ENTITY) | 10.18 | Version-aware serialization (inline OQL on 10.x) |
 | Page parameters (Params: { ... }) | 11.0 | InvalidOperationException on 'Variable' property |
 | Design properties (Atlas v3) | 11.0 | CE6083: "Design property not supported by your theme" |
 | REST client (CREATE REST CLIENT) | 11.0 | BSON format incompatibility |
@@ -82,7 +82,7 @@ The Mendix metamodel evolves across versions. The reflection data shows ~42% typ
 
 ### View Entities (10.x vs 11.x)
 
-View entities exist in both 10.18+ and 11.x, but the BSON structure differs. Mendix 10.x stores view entities without the OQL query field that 11.x requires. Writing a view entity with 11.x BSON to a 10.x project causes CE6775.
+View entities exist in both 10.18+ and 11.x, but the BSON structure differs. In Mendix 10.x, the `OqlViewEntitySource` object has an `Oql` field that stores the OQL query inline (in addition to the separate `ViewEntitySourceDocument`). Mendix 11.0 removed the inline `Oql` field. The writer detects the project version and includes the inline field for 10.x projects.
 
 ### Page Parameters (10.x vs 11.x)
 

mdl-examples/doctype-tests/01-domain-model-examples.mdl

@@ -699,9 +699,9 @@ TYPE ReferenceSet
 OWNER Both;
 /
 
--- @version: 11.0+
+-- @version: 10.18+
 -- ############################################################################
--- PART 7: VIEW ENTITIES (OQL) — requires Mendix 11.0+
+-- PART 7: VIEW ENTITIES (OQL) — requires Mendix 10.18+
 -- ############################################################################
 
 -- MARK: View Entities
@@ -1235,9 +1235,9 @@ CREATE OR MODIFY NON-PERSISTENT ENTITY DmTest.FilterParameters (
 );
 /
 
--- @version: 11.0+
+-- @version: 10.18+
 -- ============================================================================
--- Level 9.5: CREATE OR MODIFY for View Entity — requires Mendix 11.0+
+-- Level 9.5: CREATE OR MODIFY for View Entity — requires Mendix 10.18+
 -- ============================================================================
 --
 -- View entities can also use CREATE OR MODIFY to update their definition.
@@ -1453,9 +1453,9 @@ ALTER ENTITY DmTest.VATRate
 ALTER ENTITY DmTest.VATRate
   SET POSITION (300, 400);
 
--- @version: 11.0+
+-- @version: 10.18+
 -- ============================================================================
--- PART 11: COMPLEX VIEW ENTITIES WITH SUBQUERIES — requires Mendix 11.0+
+-- PART 11: COMPLEX VIEW ENTITIES WITH SUBQUERIES — requires Mendix 10.18+
 -- ============================================================================
 -- Demonstrates advanced OQL features including:
 --   - Inline subqueries (derived tables)

mdl/executor/roundtrip_mxcheck_test.go

@@ -629,7 +629,7 @@ func TestMxCheck_ViewEntitySimple(t *testing.T) {
 
 	env := setupTestEnv(t)
 	defer env.teardown()
-	env.requireMinVersion(t, 11, 0) // VIEW ENTITY BSON format requires 11.0+
+	env.requireMinVersion(t, 10, 18) // VIEW ENTITY requires 10.18+
 
 	mod := testModule
 
@@ -684,7 +684,7 @@ func TestMxCheck_ViewEntityWithAggregates(t *testing.T) {
 
 	env := setupTestEnv(t)
 	defer env.teardown()
-	env.requireMinVersion(t, 11, 0) // VIEW ENTITY BSON format requires 11.0+
+	env.requireMinVersion(t, 10, 18) // VIEW ENTITY requires 10.18+
 
 	mod := testModule