fix: pass config+config_path to WebServerDeps so audio profile persists to disk; add boot-time period/rate override loading from config.yaml

tests/test_audio_system.py

@@ -164,7 +164,7 @@ def test_systemd_service_content_default():
     assert "-p128" in content
     assert "-n2" in content
     assert "-r48000" in content
-    assert "LimitRTPRIO=95" in content
+    assert "LimitRTPRIO=99" in content
     assert "LimitMEMLOCK=infinity" in content
     assert "WantedBy=multi-user.target" in content
 

tests/test_integration.py

@@ -436,7 +436,7 @@ class TestSystemdServices:
         """Service unit includes real-time audio priority limits."""
         from src.system.services import pedal_service_content
         content = pedal_service_content()
-        assert "LimitRTPRIO=95" in content
+        assert "LimitRTPRIO=99" in content
         assert "LimitMEMLOCK=infinity" in content
         assert "LimitNICE=-20" in content