Normalizer-based SQL pattern recognition (planner + query engine + ingest)

[hshafqat-art]

Also adds ComputedLabelConfig/StatefulTransitionConfig as shared asap_types,
wires ingest-time computed-label and stateful-transition execution, and adds
the 200-query bgp_jan2024_rrc00 analyst workload.

[milindsrivastava1997]

FYI @zzylol

[milindsrivastava1997]

@hshafqat-art This is my understanding of what's in here. Can you confirm if this is correct and complete?

1. SQL pattern-rewrite feature — detecting ClickHouse-specific complex shapes (CTE/window funcs, tokenized subqueries, MOAS, multi-aggregate, bucketed countIf) and rewriting/planning/serving them. Spans sql_utilities/ast_matching/*, the new ComputedLabelConfig/StatefulTransitionConfig shared types, planner/sql.rs + sql/generator.rs, and the query-engine serving/ingest side (simple_engine/sql.rs, clickhouse_http.rs, servers/http.rs, engine_config.rs, new SetAggregator/DeltaSetAggregator accumulators, HLL string-hashing for non-numeric distinct targets, precompute_engine/computed_labels.rs + stateful_transition.rs).

2. CSV ingest: accept ClickHouse DateTime string timestamps, not just Unix-ms (parse_timestamp_ms/days_from_civil in csv_ingest.rs). No dependency on (1)

3. Finite CSV-ingest lifecycle fixes — explicit ctx.router.broadcast_flush() before shutdown (final windows were being dropped) + keeping the HTTP query server alive after CSV EOF instead of exiting (precompute_engine.rs bin,
file_ingest_mode/keep_query_server_alive). Also independent of (1)

4. Ingest-routing now enforces spatial_filter predicates (ingest_source.rs, sample_matches_spatial_filter + clause parser for =/!=/<>/IN (...)). Before this, an unrecognized filter clause silently let every sample through unfiltered

5. BGP query workload. Already taken care of by https://github.com/ProjectASAP/ASAPPlanner/pull/219