perf: add materialized view for aircraft stats dashboard

[okane16]

Summary

The aircraftSpeedAltitudeByType dashboard query is the #1 slowest query in production, scanning 63.9M rows (1.66 GB) on every page load to produce 30 aggregated rows. This PR adds an incremental AggregatingMergeTree materialized view that pre-computes category-level stats at insert time, reducing the dashboard query from a full table scan to reading ~41 pre-aggregated rows.

Changes

• New file: moose/app/ingest/aircraft_stats_mv.ts — defines AircraftStatsByCategoryTable (AggregatingMergeTree) and AircraftStatsByCategoryMV (incremental MV over AircraftTrackingProcessedTable)
• Updated: moose/app/apis/aircraftSpeedAltitudeByType.ts — fast path reads from the MV target table for the default (unfiltered) dashboard load; falls back to the full table scan only when altitude/speed range filters are active
• Updated: moose/app/index.ts — exports the new MV resources
• Bump: moose-lib and moose-cli from 0.6.493 → 0.6.495 (fixes hosting build version mismatch)

Benchmark Results

Benchmarked on production ClickHouse (main branch, 63.9M rows):

Metric	Baseline (full scan)	Candidate (MV)	Improvement
Duration run 1	6,748 ms	86 ms	78x
Duration run 2	5,730 ms	233 ms	25x
Duration run 3	8,437 ms	123 ms	69x
Avg duration	6,972 ms	147 ms	47x faster
Granules read	7,819 / 7,819	5 / 5	1,564x fewer
Result rows	30	30	Parity ✅

EXPLAIN Comparison

Baseline:

ReadFromMergeTree (AircraftTrackingProcessedTable)
  PrimaryKey Condition: true
  Parts: 13/13
  Granules: 7819/7819    ← full scan

Candidate:

ReadFromMergeTree (AircraftStatsByCategoryTable)
  PrimaryKey Condition: true
  Parts: 5/5
  Granules: 5/5           ← 41 pre-aggregated rows

Caveats

• The MV only pre-aggregates data inserted after the MV is created. A one-time backfill INSERT INTO ... SELECT is recommended after merge to cover historical data.
• Dashboard requests with altitude/speed range filters still hit the full table. These filters do not appear in the production slow query log (all top-10 slow queries are the unfiltered default).
• The MV is additive — no existing tables or data are modified.

Test Plan

• TypeScript compiles cleanly (npx tsc --noEmit)
• moose ls detects the new table and MV
• Preview deployment builds and deploys successfully
• Benchmark shows 47x improvement on production data
• After merge: run backfill INSERT to populate MV with historical data
• Verify dashboard loads correctly via the MV fast path

Made with Cursor

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