Replace string-quoted station_id lists with comma-separated, integer-casted lists and harden SQL across awards models. This diff converts constructions like "'a','b'" to implode(',', array_map('intval', ...)) and uses $this->db->escape_str() for band/mode values and band lists to reduce injection/format issues. Added helper methods (addModeToQuery, addBandToQuery variants) to centralize mode/band filtering, parameterized time/mode/band queries in Gmdxsummer_model, and escaped band arrays when building IN() lists. Also added null/empty-checks for logbook arrays in several models and small refactors (e.g. VUCC addBandToQuery) to keep SQL building consistent.
