feat(1.0)!: freeze the metadata contract at Metamodel 1.0

`metamodelVersion` 0.14 → 1.0 in all five byte-gated sites, via
`scripts/check-metamodel-version.mjs --set 1.0`.

This is the METADATA axis, which ADR-0035 Amendment 2 keeps separate from the package
axis: the number promises the registered vocabulary, the canonical/interchange format and
the wire contract, and from here a change to any of them is a MAJOR on that axis alone.
The registry manifest itself is unchanged since v0.25.0 — the gate reports "none change …
declared 1.0 (0.14 → 1.0)". That is the point of the cut: the vocabulary that ships is the
vocabulary 1.0 covers, which is what `docs/1.0-readiness.md` G3a declared.

Package versions do not move here. The npm publish set is bumped transiently at RC and
release time and never committed (scripts/check-no-prerelease-versions.sh).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3v6M6uqECZ2Sb5eUv6YY

Author: dmealing

fixtures/registry-conformance/expected-registry.json

@@ -1,5 +1,5 @@
 {
-  "metamodelVersion": "0.14",
+  "metamodelVersion": "1.0",
   "types": [
     {
       "type": "attr",

server/csharp/MetaObjects/RegistryManifest.cs

@@ -374,7 +374,7 @@ private static ManifestType ToManifestType(TypeDefinition def) =>
     /// unstable (semver major-0). The 1.0 cut flips this to <c>"1.0"</c>.
     /// Emitted as the FIRST top-level key in the registry manifest (C4).
     /// </summary>
-    public const string MetamodelVersion = "0.14";
+    public const string MetamodelVersion = "1.0";
 
     /// <summary>
     /// Emit the canonical registry manifest as a byte-stable JSON string.

server/java/metadata/src/main/java/com/metaobjects/registry/RegistryManifest.java

@@ -274,7 +274,7 @@ public static List<MetaDataTypeProvider> metamodelProviders() {
      * the 1.0 cut will flip it to {@code "1.0"}. Mirrors the TS reference's
      * {@code METAMODEL_VERSION} constant.
      */
-    public static final String METAMODEL_VERSION = "0.14";
+    public static final String METAMODEL_VERSION = "1.0";
 
     // ------------------------------------------------------------------
     // SP-G Phase1 Units2-3 — manifest emitter exclusions (documented, uniform

server/python/src/metaobjects/registry_manifest.py

@@ -255,7 +255,7 @@ def _sorted_children(definition: TypeDefinition) -> list[dict[str, object]]:
     return children
 
 
-METAMODEL_VERSION = "0.14"
+METAMODEL_VERSION = "1.0"
 """Rolled-up spec-version for the cross-port registry manifest.
 
 ``"0"`` = pre-1.0 / unstable (semver major-0). Flips to ``"1.0"`` at the

server/typescript/packages/metadata/src/registry-manifest.ts

@@ -112,7 +112,7 @@ export interface ManifestType {
  * constant read `"0.10"`). Bump with that script — never by hand — so the manifest and
  * all four port constants move together.
  */
-export const METAMODEL_VERSION = "0.14";
+export const METAMODEL_VERSION = "1.0";
 
 /** The full canonical manifest. All collections are sorted for byte-stability. */
 interface RegistryManifest {