fix: merge PR #54 logic into Peewee-based downloaded.py and known.py

Agent-Logs-Url: https://github.com/Josverl/mpflash/sessions/aa04d353-9662-4e16-af82-a6e9dd592f2d

Co-authored-by: Josverl <981654+Josverl@users.noreply.github.com>

Author: Copilot

mpflash/downloaded.py

@@ -103,7 +103,7 @@ def find_downloaded_firmware(
         if fw_list:
             return [fw_list[0]]
     else:
-        fw_list = list(Firmware.select().where((Firmware.board_id.in_(more_board_ids)) & (Firmware.version == version)))
+        qry = Firmware.select().where((Firmware.board_id.in_(more_board_ids)) & (Firmware.version == version))
         if port:
             qry = qry.where(Firmware.port == port)
         fw_list = list(qry)

mpflash/mpboard_id/known.py

@@ -73,7 +73,6 @@ def find_known_board(board_id: str, version="", port="") -> Board:
 
     lookup_id = board_id.split("@")[0]
 
-    # Primary lookup by board_id
     qry = Board.select().where(Board.board_id == lookup_id)
     if version:
         qry = qry.where(Board.version == version)
@@ -84,7 +83,7 @@ def find_known_board(board_id: str, version="", port="") -> Board:
             matching = [b for b in candidates if b.port == port]
             if matching:
                 return matching[0]
-            # No port match among candidates - fall through to alternate name lookup
+            # No port match among candidates — fall through to alternate name lookup
         else:
             return candidates[0]