feat(elasticsearch): add SQL-model execution with mapping-aware completion

- Route SELECT * FROM <index> through /_search for simple browses; aggregates/projections stay on /_sql
- Drive completion columns from /_mapping (flattened dotted fields, multi-fields)
- Switch editor completion to SQL when the active statement starts with SELECT/WITH on ES
- Skip generic SQL semantic diagnostics for ES (hyphenated wildcard indices caused 500s)
- Wire ES into server-side pagination plan; derive completion context from line blocks
- Fix result-grid pagination exceeding in-memory result sets (allRowsLoaded)

apps/desktop/src/components/editor/QueryEditor.vue

@@ -29,6 +29,7 @@ import {
   getSqlFunctionSignatureHelp,
   getSqlCompletionContext,
   getSqlCompletionResultValidFor,
+  isSqlLikeCompletionStatement,
   shouldAutoOpenSqlCompletion,
   extractCteDefinitions,
 } from "@/lib/sqlCompletion";
@@ -739,7 +740,13 @@ async function refreshSemanticDiagnostics() {
     setSemanticDiagnostics([]);
     return;
   }
-  if (!shouldRunSqlSemanticDiagnostics(sql, currentView.state.selection.main.head)) {
+  if (props.databaseType === "elasticsearch") {
+    setSemanticDiagnostics([]);
+    return;
+  }
+  if (
+    !shouldRunSqlSemanticDiagnostics(sql, currentView.state.selection.main.head, { databaseType: props.databaseType })
+  ) {
     scheduleSemanticDiagnostics(1200);
     return;
   }
@@ -933,15 +940,17 @@ async function provideSqlCompletions(
   explicit: boolean,
 ) {
   if (!props.connectionId) return null;
+  const fullDoc = currentState.doc.toString();
   if (props.databaseType === "elasticsearch") {
-    return provideElasticsearchCompletions(currentState, position, explicit);
+    if (!isSqlLikeCompletionStatement(fullDoc, position)) {
+      return provideElasticsearchCompletions(currentState, position, explicit);
+    }
   }
   const hasDatabase = props.database != null;
 
   const epoch = ++completionEpoch;
 
   try {
-    const fullDoc = currentState.doc.toString();
     if (!explicit && !shouldAutoOpenSqlCompletion(fullDoc, position)) return null;
 
     const completionContext = getSqlCompletionContext(fullDoc, position);