Include tuning in metadata

This may not be entirely desirable - the tuning can be quite a lot of data. I'm
including it here as it's useful, but we may want to handle it differntly in the future.

Author: rwb27

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "labthings-picamera2"
-version = "0.0.2-dev0"
+version = "0.0.2-dev1"
 authors = [
   { name="Richard Bowman", email="[email protected]" },
 ]

src/labthings_picamera2/thing.py

@@ -561,7 +561,7 @@ def capture_raw(
         return RawImageModel(
             image_data = RawBlob.from_bytes(buffer.tobytes()),
             thing_states = states_getter() if get_states else None,
-            metadata = { "parameters": parameters, "sensor": configuration["sensor"] },
+            metadata = { "parameters": parameters, "sensor": configuration["sensor"], "tuning": self.tuning },
             processing_inputs = (
                 self.image_processing_inputs if get_processing_inputs else None
             ),