feat(dev_tools): enhance SQL Query Tool — clear, copy, history, edit, hardening

UI: add Clear and Copy-to-clipboard (TSV) buttons, an in-page Recent
Queries pane (localStorage, capped at 20, de-duped) and a pencil-edit
flow for saved queries with a dedicated SQL field in the modal.
Bind Ctrl/Cmd+S to open the save modal (or edit the active saved query).

Backend: harden validate_query with a multi-statement guard that
respects string literals + comments. Stop swallowing record_query_run
errors silently — log via logger.exception so failures show up.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/modules/dev_tools/tests/unit/test_sql_query_service.py

@@ -53,3 +53,16 @@ class TestValidateQuery:
 
     def test_select_with_where(self):
         validate_query("SELECT id, email FROM users WHERE is_active = true")
+
+    def test_trailing_semicolon_allowed(self):
+        validate_query("SELECT 1;")
+
+    def test_multi_statement_rejected(self):
+        with pytest.raises(QueryValidationError, match="Multiple statements"):
+            validate_query("SELECT 1; SELECT 2")
+
+    def test_semicolon_in_string_literal_allowed(self):
+        validate_query("SELECT ';' AS sep")
+
+    def test_semicolon_in_comment_allowed(self):
+        validate_query("SELECT 1 -- end; second\nFROM dual")