manually trigger on_start on initialize

Signed-off-by: Kyle Sayers <kylesayrs@gmail.com>

Author: kylesayrs

src/llmcompressor/modifiers/quantization/quantization/base.py

@@ -61,6 +61,11 @@ def on_initialize(self, state: State, **kwargs) -> bool:
         """
         QuantizationMixin.attach_scheme_and_observers(self, state.model)
         state.model.apply(disable_quantization)  # disable quantization until start
+
+        # FUTURE: modify oneshot lifecycle to trigger on_start for on initialize
+        if self.calculate_start() == -1:  # one shot
+            self.on_start(state)
+
         return True
 
     def on_start(self, state: State):