Improved parsing of low_soc

Forced low_soc to be imported from palm_settings as an integer in case of user error in settings file.

palm_utils.py

@@ -469,9 +469,9 @@ def compute_tgt_soc(self, gen_fcast, weight: int, commit: bool) -> str:
         # low_soc is the minimum SoC target. Provide more buffer capacity in shoulder months
         # when load is likely to be more variable, e.g. heating
         if stgs.pg.month in stgs.GE.shoulder:
-            low_soc = stgs.GE.max_soc_target
+            low_soc = int(stgs.GE.max_soc_target)
         else:
-            low_soc = stgs.GE.min_soc_target
+            low_soc = int(stgs.GE.min_soc_target)
 
         max_charge_pc = max_charge_pcnt[0]
         min_charge_pc = min_charge_pcnt[0]