fix: configure Dialyzer to ignore Mix.Task callback warnings

Add Dialyzer configuration to suppress informational warnings:
- Added .dialyzer_ignore.exs to ignore callback_info_missing for Mix.Task
- Added plt_add_apps: [:mix] to include Mix in PLT
- Removed overly-specific check_freshness/1 spec to use inference

These warnings are harmless and occur because Mix.Task behaviour
callback info is not available in the PLT.

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

Co-Authored-By: Claude <[email protected]>

Author: GSMLG-BOT

.dialyzer_ignore.exs

@@ -0,0 +1,6 @@
+[
+  # Ignore Mix.Task callback_info_missing warnings
+  # These are harmless informational warnings about Mix.Task behaviour
+  {"lib/phoenix/mix/build/bun.ex", :callback_info_missing},
+  {"lib/phoenix/mix/build/deno.ex", :callback_info_missing}
+]

lib/phoenix/react_server/cache.ex

@@ -187,7 +187,6 @@ defmodule Phoenix.ReactServer.Cache do
     end
   end
 
-  @spec check_freshness(cache_record()) :: String.t() | nil
   defp check_freshness({[component, props, method], result, expiration}) do
     if expiration > :os.system_time(:seconds) do
       result

mix.exs

@@ -11,6 +11,7 @@ defmodule Phoenix.ReactServer.Mixfile do
       elixir: "~> 1.14.1 or ~> 1.15",
       config_path: "config/config.exs",
       deps: deps(),
+      dialyzer: dialyzer(),
       name: "Phoenix.ReactServer",
       description: """
       Phoenix.ReactServer is use for renders React component as Phoenix Component in heex template.
@@ -70,4 +71,11 @@ defmodule Phoenix.ReactServer.Mixfile do
       lint: ["credo --strict", "dialyzer"]
     ]
   end
+
+  defp dialyzer do
+    [
+      plt_add_apps: [:mix],
+      ignore_warnings: ".dialyzer_ignore.exs"
+    ]
+  end
 end