mdssvc: add support for parsing date ranges

Example:

  InRange(kMDItemContentCreationDate,$time.iso(2024-12-31T23:00:00Z),$time.iso(2025-12-31T23:00:00Z))

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15930

Signed-off-by: Ralph Boehme <[email protected]>
Reviewed-by: Volker Lendecke <[email protected]>

Autobuild-User(master): Ralph Böhme <[email protected]>
Autobuild-Date(master): Mon Oct 20 10:59:03 UTC 2025 on atb-devel-224

Author: slowfranklin

selftest/knownfail.d/samba.unittests.mdsparser_es

@@ -219,6 +219,13 @@ FUNC_INRANGE OBRACE attribute COMMA WORD COMMA WORD CBRACE {
 	} else {
 		$$ = map_expr($3, '~', $5, $7);
 	}
+}
+| FUNC_INRANGE OBRACE attribute COMMA isodate COMMA isodate CBRACE {
+	if ($3 == NULL) {
+		$$ = NULL;
+	} else {
+		$$ = map_expr($3, '~', $5, $7);
+	}
 };
 
 attribute: