feat(ingestion): add event filter evaluation step to ingestion pipeline

[pl]

Problem

We need the Node.js ingestion pipeline to evaluate customer-configured event filters and drop (or count in dry run) matching events before they reach transformations.

Stacked on #52649 (migration PR).

Changes

Adds event filter evaluation to the Node.js ingestion pipeline:

• common/event-filters/ module:

  • schema.ts — zod schemas for filter tree nodes and DB rows, with EventFilterMode (disabled/dry_run/live)
  • evaluate.ts — recursive tree evaluation with conservative empty-group handling (empty AND = false, not vacuous true)
  • manager.ts — EventFilterManager using BackgroundRefresher (60s) to load active filters from Postgres
  • Full test coverage: 46 tests across schema validation, evaluation logic, and manager behavior

• common/steps/apply-event-filters-step.ts — pipeline step in post-team preprocessing:

  • Live mode: drops matching events, produces dropped app metric
  • Dry run mode: lets events through, produces would_be_dropped app metric
  • App metrics written to clickhouse_app_metrics2 via APP_METRICS_OUTPUT

• Wiring: EventFilterManager created in ingestion-consumer.ts, passed through joined-ingestion-pipeline → post-team-preprocessing-subpipeline

How did you test this code?

• 46 unit tests (pnpm test -- event-filters): schema validation, tree evaluation (empty groups, conditions, AND/OR/NOT, complex trees), manager behavior (valid/invalid rows, dry_run/live modes, empty trees)
• Integration tested via bin/test-event-filters script on local dev environment

Publish to changelog?

No

[eli-r-ph]

🤔 lines 44-45 (not condition) return !treeHasConditions(node.child) ?

[eli-r-ph]

oh nm this is the condition check, got it 👍

[eli-r-ph]

Still in draft, happy to loop back if you add more but this LGTM 👍 can prestamp