fix: restore earthdistance function search paths

Reapply the public search_path for ll_to_earth and earth_box after the earthdistance extension upgrade.

TeslaMate previously set these functions to use the public schema to avoid lookup errors around the earth type. The later earthdistance update migration upgrades the extension but does not restore that custom function metadata, which can leave the functions without the expected search path.

This adds a follow-up migration that sets the search path for both functions back to public.

Author: nebhale

priv/repo/migrations/20260312120000_set_search_path_for_earthdistance_functions.exs

@@ -0,0 +1,12 @@
+defmodule TeslaMate.Repo.Migrations.SetSearchPathForEarthdistanceFunctions do
+  use Ecto.Migration
+
+  def up do
+    execute("ALTER FUNCTION ll_to_earth SET search_path = public")
+    execute("ALTER FUNCTION earth_box SET search_path = public")
+  end
+
+  def down do
+    :ok
+  end
+end