Consider nesting `Calibration` in `Device`

[bruno-f-cruz]

Is your feature request related to a problem? Please describe.
In all the cases I have encountered, Calibration is always tied to a specific device. Indeed, the current spec makes this clear in the Calibration class by adding a device_name REQUIRED property to keep track of this association

aind-data-schema/src/aind_data_schema/models/devices.py

Lines 270 to 278 in 0328cbe

	class Calibration(AindModel):
	"""Generic calibration class"""
	calibration_date: datetime = Field(..., title="Date and time of calibration")
	device_name: str = Field(..., title="Device name", description="Must match a device name in rig/instrument")
	description: str = Field(..., title="Description", description="Brief description of what is being calibrated")
	input: AindGenericType = Field(AindGeneric(), description="Calibration input", title="inputs")
	output: AindGenericType = Field(AindGeneric(), description="Calibration output", title="outputs")
	notes: Optional[str] = Field(None, title="Notes")

Describe the solution you'd like
Make calibration a nested field inside Device with the Optional[Calibration] typing. For hardware installation and experiment specification this would be a huge help and it would allow users to not have to grab cross-referenced data across different class (well actually across schemas, since Calibration is currently also stored in Session (?))

Describe alternatives you've considered
N/A