ci(postgres): fix semgrep + two review findings in the checker

- semgrep: annotate the source-reading open() with # nosemgrep for the
  frappe-security-file-traversal rule (dev-only lint tool; path comes from pre-commit,
  not user input).
- bool-scan: only inspect the field *value* arg (db_set args[1]/dict args[0];
  set_value args[3]/dict args[2]) so a positional update_modified=False
  (e.g. db_set('f', 0, False)) no longer false-positives.
- # pg-ok: also honour the annotation on a multi-line call's closing paren line
  (scan one line past the node's end).

.github/helper/postgres_compat.py

@@ -92,10 +92,10 @@ class Visitor(ast.NodeVisitor):
 	def _ignored(self, node: ast.AST) -> bool:
 		start = getattr(node, "lineno", 1)
 		end = getattr(node, "end_lineno", start) or start
-		# honour `# pg-ok` anywhere on the node's line span, or on the line just above
-		# (the enclosing call, e.g. `frappe.db.sql(  # pg-ok`).
+		# honour `# pg-ok` anywhere on the node's line span, the line just above (the enclosing
+		# call, e.g. `frappe.db.sql(  # pg-ok`), or the line just below (a multi-line call's `)  # pg-ok`).
 		lo = max(0, start - 2)
-		return any(IGNORE in self.lines[i] for i in range(lo, min(end, len(self.lines))))
+		return any(IGNORE in self.lines[i] for i in range(lo, min(end + 1, len(self.lines))))
 
 	def _flag(self, node: ast.AST, msg: str) -> None:
 		if not self._ignored(node):
@@ -134,15 +134,25 @@ class Visitor(ast.NodeVisitor):
 		if name == "get" and node.args and isinstance(node.args[0], ast.Constant) and node.args[0].value in MYSQL_RESULT_KEYS:
 			self._flag(node, f'"{node.args[0].value}" is a MySQL SHOW INDEX result key -> use frappe.db.has_index()/get_column_index()')
 
-		# set_value(..., True) / db_set("field", True) on a Check (int) column
+		# set_value(..., True) / db_set("field", True) on a Check (int) column.
+		# Only the field *value* arg carries bool->smallint risk — NOT trailing flags like
+		# update_modified. db_set(field, value, update_modified, ...) -> value at args[1] (or a dict
+		# at args[0]); set_value(dt, dn, field, value, ...) -> value at args[3] (or a dict at args[2]).
 		if name in SET_BOOL_FUNCS:
-			for a in node.args:
+			value_idx, dict_idx = (1, 0) if name == "db_set" else (3, 2)
+			dict_arg = (
+				node.args[dict_idx]
+				if len(node.args) > dict_idx and isinstance(node.args[dict_idx], ast.Dict)
+				else None
+			)
+			if dict_arg is not None:
+				for v in dict_arg.values:
+					if isinstance(v, ast.Constant) and isinstance(v.value, bool):
+						self._flag(node, f"{name}(...) sets an int/Check column with a bool in a dict -> pass 1/0 (Postgres rejects bool->smallint)")
+			elif len(node.args) > value_idx:
+				a = node.args[value_idx]
 				if isinstance(a, ast.Constant) and isinstance(a.value, bool):
 					self._flag(node, f"{name}(..., {a.value}) sets an int/Check column with a bool -> pass 1/0 (Postgres rejects bool->smallint)")
-				elif isinstance(a, ast.Dict):
-					for v in a.values:
-						if isinstance(v, ast.Constant) and isinstance(v.value, bool):
-							self._flag(node, f"{name}(...) sets an int/Check column with a bool in a dict -> pass 1/0 (Postgres rejects bool->smallint)")
 
 		self.generic_visit(node)
 
@@ -155,6 +165,7 @@ class Visitor(ast.NodeVisitor):
 
 def check_file(path: str) -> list[str]:
 	try:
+		# nosemgrep: frappe-semgrep-rules.rules.security.frappe-security-file-traversal -- dev-only lint tool; `path` is a source file supplied by pre-commit, not user input
 		src = open(path, encoding="utf-8").read()
 	except (OSError, UnicodeDecodeError):
 		return []