fix: reenable compile task before running queued tasks

When igniter writes newly generated source files to disk and then runs
queued tasks (like `ash.codegen`), those tasks call
`Mix.Task.run("compile")` which is a no-op because compile already ran
earlier in the igniter pipeline — before the new files existed.

This causes `Code.ensure_compiled/1` to fail with `:nofile` for any
modules that were generated during the install process.

Fix by re-enabling compile, app.config, and loadpaths before each
queued task so that downstream tasks can trigger a fresh compilation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: albinkc

lib/igniter.ex

@@ -2132,6 +2132,14 @@ defmodule Igniter do
 
   defp run_next([{task_name, args} | rest]) do
     Mix.Task.reenable(task_name)
+
+    # Re-enable compile and related tasks so that queued tasks which
+    # invoke `Mix.Task.run("compile")` (e.g. `ash.codegen`) actually
+    # trigger a fresh compilation of newly written source files.
+    # Without this, compile is a no-op because it already ran earlier
+    # in the igniter pipeline before the new files were written to disk.
+    Enum.each(["compile", "app.config", "loadpaths"], &Mix.Task.reenable/1)
+
     Mix.Task.run(task_name, args)
     run_next(rest)
   rescue