SEA Action

• Add two new sets of channel power summary statistics to the metadata: median and mean. This adds to the previous summary statistics: max and median-of-mean. These are stored similarly to the existing channel power summaries, and their objects will be formalized in a v0.6.0 update to the ntia-nasctn-sea SigMF extension.
• Add software diagnostics information to metadata: system platform info (e.g., "Linux-5.4.0-153-generic-x86_64-with-glibc2.29"), Git tag version for SCOS Sensor, Python version (e.g. 3.8.10), and version numbers for Python packages: its_preselector, scos_tekrsa, and scos_actions. These live in a new Software object, to be defined in an update v1.1.0 to the ntia-diagnostics SigMF extension
• Add more sensor hardware information to the metadata: sensor version, signal analyzer ID, preselector ID, and computer ID. These are all pulled from the sensor definition file, and stored using existing ntia-sensor SigMF objects.

General Updates

• Bump package version to 6.3.3
• Update pre-commit hooks

These changes were tested on seadog01. After this PR is reviewed, I will make corresponding PRs in NTIA/scos-tekrsa, NTIA/sigmf-ns-ntia, and NTIA/scos-sensor.