fix(metadata): remove duplicate opsForSubType import (merge artifact breaking tsc build) + regen coverage snapshot

The standalone import (Unit 9) + the block import (merged TPH filter-compose work) both pulled opsForSubType from query-constants → TS2300 duplicate identifier (masked by bun-test; broke tsc/build). Removed the standalone; coverage snapshot regenerated (1 attr now exercised).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: dmealing

fixtures/registry-conformance/coverage-report.json

@@ -171,7 +171,6 @@
         "objectRef",
         "precision",
         "scale",
-        "sortable",
         "sortableDefaultOrder",
         "storage",
         "unique"

server/typescript/packages/metadata/src/loader/validation-passes.ts

@@ -58,7 +58,6 @@ import {
 } from "../core/field/field-constants.js";
 import { FIELD_ATTR_DB_INDEXED } from "../persistence/db/db-constants.js";
 import { IDENTITY_ATTR_FIELDS } from "../core/identity/identity-constants.js";
-import { opsForSubType } from "../core/query/query-constants.js";
 import {
   ORIGIN_SUBTYPE_PASSTHROUGH,
   ORIGIN_SUBTYPE_AGGREGATE,