feat(planner): --planner saved for SQL (multigroup e2e tables) #856

Goal

Let asap-planner --planner saved --query-language sql turn a sketch-bench plan for the multigroup/all tables into streaming_config.yaml and inference_config.yaml, as #828 does for PromQL. The end-to-end eval (#862) runs the all workload's 52 multigroup SQL queries this way.

sketch-bench#209 gives the multi-grouping templates (11–17) structured e2e entries. Each entry carries its ASAPQuery SQL in sql (e.g. SELECT region, QUANTILE(0.99, latency) FROM http WHERE ts BETWEEN DATEADD(s, -300, NOW()) AND NOW() GROUP BY region), and the table's metrics are records tables.

Scope

• An e2e query carries either promql or sql. --query-language picks which entries are used; it's an error if none match. This also keeps PromQL --planner saved working on all tables.
• records metrics become SQL tables: labels → metadata_columns, values → value_columns, time column ts. A SQLControllerConfig is built from the sql strings, one query group per interval_secs.
• A query may read several RQEs (Add CI for building and pushing packages to ghcr #209 merges templates 14, 15 and 17). All of its picks must land on one deployment.
• Fixture tests: a SQL table with a roll-up pick, a query reading several RQEs, a split pick and a plan from another table (both refused), and an all-style table run in each language.
• Manual check: convert sketch-bench#212's 10/s multigroup-shared1 and all-shared1 plans, in both languages.

Out of scope

• Checking sql against the entry's other fields (table, value, grouping, …): sketch-bench's exporter owns that consistency.
• Sending SQL queries from the e2e runner (feat(asap-tools): run sketch-bench workload tables end to end with the paced feeder #841).