Logic for Bayesian update procedure

[d-j-hatton]

Also includes command line tools for rough simulations of the prediction and update processes.

• Test command line tools
• Test timestamp ordering logic for Bayesian update method

[vredchenko]

Nice! I have a couple of remarks:

• I already use /tools and /tests dirs outside src/ - these scripts could arguably be categorised as either. I don't mind changing away from tools and tests, introducing cli to consolidate all command-line stuff, and/or moving any of them under src/ - whatever you prefer?
• I changed all but 3 DB tables PKs to str and they are now set externally and originate from the agent. The change is still WIP so just a heads up: https://github.com/DiamondLightSource/smartem-decisions/pull/92/files#diff-4fde086effb1f2a43b38b62bd1e0c0c96e75337b957f16b7ee37bbea49059258

@staticmethod
    def generate_uuid():
        return urlsafe_b64encode(uuid4().bytes).decode('ascii').rstrip('=')

[d-j-hatton]

• I already use /tools and /tests dirs outside src/ - these scripts could arguably be categorised as either. I don't mind changing away from tools and tests, introducing cli to consolidate all command-line stuff, and/or moving any of them under src/ - whatever you prefer?

Putting them in tools makes sense I think, I have no problem with them going there

[vredchenko]

• I already use /tools and /tests dirs outside src/ - these scripts could arguably be categorised as either. I don't mind changing away from tools and tests, introducing cli to consolidate all command-line stuff, and/or moving any of them under src/ - whatever you prefer?

Putting them in tools makes sense I think, I have no problem with them going there

Cool, I guess this PR depends on #92 so we can leave this hanging for now - if you like I'll pick this up and consolidate it with 92 once that one's finished

[d-j-hatton]

Sounds good. Gives me time to test it properly. Swamped with paperwork today