feat: flatten annotation summary table columns

[yfrigui2]

Summary

• replace grouped label and mean-score annotation columns with one compact summary column in the Spans, Traces, and Sessions tables
• show label fractions, mean score, score coverage, and categorical-config colors through the existing summary hover treatment
• preserve score sorting, keep trace-annotation columns non-sortable, and migrate persisted grouped-column order to the flat IDs
• regenerate Relay artifacts and add sorting/order unit coverage

Screenshots

before

after

Resolves #15128

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Project	Status	Preview	Updated (UTC)
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[mikeldking]

Haven't reviewed the code but I'd like to move away from the cicle charts. They are more confusing than useful. also I can't see the individual annotations and explanations on the hover or apply a filter. Can we re-use the tooltip you created previously so we can perform the same actions? I think this needs a bit of polish.

I can pull it down once we have the tooltip consolidated on the version that has the actual annotations and have the filters working.

[mikeldking]

We need to have the explanations, filters etc. that were added in your previous PR