Can't store object dtyped sampler warnings in ClickHouseBackend #73
Description
Since PyMC v4.3.0 the sampler warnings are collected as stats, which means that they end up in the sampler_stats that the ClickHouseBackend is asked to collect.
This leads to problems because object typed variables can't be stored in ClickHouse.
How this could be addressed:
- Turn off collection of warning stats at the PyMC level
- Filter them in the
TraceBackend - Have
ClickHouseBackendignore them
Not having strong preferences yet, but the best way might be to have the ClickHouseBackend.init_run filter the unsupported variables out.