Merge PR #31 with conflict resolution

[tepickering]

Resolves #31

Contains all changes from #31 (misc updates and improvements to device.py) with the merge conflict resolved.

Conflict

device.start() had overlapping edits between #31 and #36:

• add Claude support #36 (Python 3.14 compat): asyncio.new_event_loop() + set_event_loop()
• A couple minor updates & improvements #31: if self.mainloop is None: self.mainloop = asyncio.get_event_loop()

Resolution

Combined both — the if self.mainloop is None: guard now wraps the new_event_loop() call:

if self.mainloop is None:
    self.mainloop = asyncio.new_event_loop()
    asyncio.set_event_loop(self.mainloop)

Changes from #31 (all included)

• Use isinstance() instead of type() equality checks throughout
• Fix f-string/backslash-in-string-literal issues in error messages
• Demote verbose prop-set log from warning to debug
• Respect pre-provided mainloop in both start() and astart()
• Use etree for IDMessage XML construction instead of string formatting
• Decode bytes in buildSkeleton error logging