feat(query): OR groups in where-clauses - #1193

🟢 Confidence 4/5 · likely safe to merge
The change only narrows which sources parse OR groups; every affected branch is covered by the new logs/metrics/product_events test.
_{quality 100/100 · no findings · tests covered · risk medium}

The builder now opts into OR groups only for the two sources that lower them (traces, logs); metrics and product_events keep the parser's "unsupported clause" warning they already produced on the base branch. Narrow, tested, safe to merge.

• buildTimeseriesQuerySpec passes orGroups only for traces and logs
• Metrics no longer gets its own OR-group warning; the parser's unsupported-clause warning replaces it

_{4e9a879 · Updated on every push. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}