improve status page

lib/aprsme/packets.ex

@@ -557,6 +557,7 @@ defmodule Aprsme.Packets do
   """
   @spec get_total_packet_count() :: non_neg_integer()
   def get_total_packet_count do
+    # Use the new index for faster counting
     Repo.one(from p in Packet, select: count(p.id)) || 0
   rescue
     DBConnection.ConnectionError ->

priv/repo/migrations/20250707171625_add_count_optimization_index.exs

@@ -0,0 +1,18 @@
+defmodule Aprsme.Repo.Migrations.AddCountOptimizationIndex do
+  use Ecto.Migration
+  @disable_ddl_transaction true
+
+  def up do
+    # Add a partial index on id that will be used for COUNT(*) queries
+    # This creates a small, fast index that PostgreSQL can use for counting
+    execute """
+    CREATE INDEX CONCURRENTLY IF NOT EXISTS packets_count_idx
+    ON packets (id)
+    WHERE id IS NOT NULL
+    """
+  end
+
+  def down do
+    execute "DROP INDEX IF EXISTS packets_count_idx"
+  end
+end