Remove caching from has_weather_packets function

Remove Cachex caching from the has_weather_packets function to ensure
real-time data display. The function now queries the database directly
for weather packet information.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/aprsme_web/live/map_live/packet_utils.ex

@@ -62,8 +62,21 @@ defmodule AprsmeWeb.MapLive.PacketUtils do
   @spec has_weather_packets?(String.t()) :: boolean()
   # Get recent packets for this callsign and check if any are weather packets
   def has_weather_packets?(callsign) when is_binary(callsign) do
-    # Use cached query for better performance
+    # Direct query without caching
-    Aprsme.CachedQueries.has_weather_packets_cached?(callsign)
+    import Ecto.Query
+
+    query =
+      from p in Aprsme.Packet,
+        where: p.sender == ^callsign,
+        where:
+          not is_nil(p.temperature) or not is_nil(p.humidity) or not is_nil(p.pressure) or
+            not is_nil(p.wind_direction) or not is_nil(p.wind_speed) or not is_nil(p.wind_gust) or
+            not is_nil(p.rain_1h) or not is_nil(p.rain_24h) or not is_nil(p.rain_midnight) or
+            not is_nil(p.luminosity) or not is_nil(p.snow_24h),
+        select: fragment("1"),
+        limit: 1
+
+    Aprsme.Repo.exists?(query)
   rescue
     _ -> false
   end