feat(tapo-agent): add schedule/countdown timer API support

- Fork tapo crate to add missing schedule/timer APIs
- Add get_countdown_rules, get_schedule_rules, get_next_event methods
- New readings: countdown_active, countdown_remain, schedule_count,
  schedule_active_count, next_event_time
- Add local compilation to build script alongside cross-compilation
- Implement offline polling - device collection continues when server disconnects
- Add more device readings: on_time, signal_level, rssi, runtime_today/month, energy_month

Vendored tapo fork in tapo-fork/ with minimal changes to add schedule APIs.

agents/tapo/tapo-fork/tapo-py/examples/tapo_ke100.py

@@ -0,0 +1,40 @@
+"""KE100 TRV Example"""
+
+import asyncio
+import os
+
+from tapo import ApiClient
+from tapo.requests import TemperatureUnitKE100
+
+
+async def main():
+    tapo_username = os.getenv("TAPO_USERNAME")
+    tapo_password = os.getenv("TAPO_PASSWORD")
+    ip_address = os.getenv("IP_ADDRESS")
+    # Name of the KE100 device.
+    # Can be obtained from the Tapo App or by executing `get_child_device_component_list()` on the hub device.
+    device_name = os.getenv("DEVICE_NAME")
+    target_temperature = int(os.getenv("TARGET_TEMPERATURE"))
+
+    client = ApiClient(tapo_username, tapo_password)
+    hub = await client.h100(ip_address)
+
+    # Get a handler for the child device
+    device = await hub.ke100(nickname=device_name)
+
+    # Get the device info of the child device
+    device_info = await device.get_device_info()
+    print(f"Device info: {device_info.to_dict()}")
+
+    # Set target temperature.
+    # KE100 currently only supports Celsius as temperature unit.
+    print(f"Setting target temperature to {target_temperature} degrees Celsius...")
+    await device.set_target_temperature(target_temperature, TemperatureUnitKE100.Celsius)
+
+    # Get the device info of the child device
+    device_info = await device.get_device_info()
+    print(f"Device info: {device_info.to_dict()}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())