fix(logs): add Plug.Telemetry metadata filter to suppress health check logs

The FilterNoisyLogs plug wasn't completely preventing logs in Phoenix 1.8.
Added metadata_filter to Plug.Telemetry to explicitly skip logging for:
- GET /health
- GET /health/time
- HEAD /

This works at the Telemetry level before logs are emitted.

lib/towerops_web/endpoint.ex

@@ -55,7 +55,20 @@ defmodule ToweropsWeb.Endpoint do
   plug ToweropsWeb.Plugs.BruteForceProtection
   plug ToweropsWeb.Plugs.SecurityHeaders
 
-  plug Plug.Telemetry, event_prefix: [:phoenix, :endpoint]
+  plug Plug.Telemetry,
+    event_prefix: [:phoenix, :endpoint],
+    log: :info,
+    metadata_filter: &__MODULE__.telemetry_metadata_filter/1
+
+  # Filter function for Plug.Telemetry - don't log health checks and uptime monitors
+  def telemetry_metadata_filter(metadata) do
+    case metadata do
+      %{conn: %{method: "GET", path_info: ["health"]}} -> false
+      %{conn: %{method: "GET", path_info: ["health", "time"]}} -> false
+      %{conn: %{method: "HEAD", path_info: []}} -> false
+      _ -> metadata
+    end
+  end
 
   plug Plug.Parsers,
     parsers: [:urlencoded, :multipart, :json],