fix(datasource-cosmos): increase maxConditions default to 1000

[PMerlet]

Summary

• Raises the default maxConditions from 100 to 1000 in QueryValidator, fixing chart queries that fail with QueryValidationError: Condition tree exceeds maximum of 100 conditions when using daily time buckets over long date ranges
• Exposes maxConditions as a configurable option in createCosmosDataSource for users who need higher limits
• Threads the option through CosmosDataSource → CosmosCollection → QueryConverter → QueryValidator
• Fixes HTTP status code: QueryValidationError now extends ValidationError from datasource-toolkit, so the agent returns 400 Bad Request instead of 500 Internal Server Error when the condition limit is hit

Context

Forest Admin charts with daily granularity generate one condition per time bucket. A year of daily data = 365 conditions, and adding 2-3 filters pushes it over 1000. The previous default of 100 broke charts for any date range beyond ~3 months.

Additionally, QueryValidationError extended plain Error, causing the agent's error handler to fall through to the default 500 status code. A query validation issue is a client error (400), not a server error (500).

Test plan

• 23 new tests in max-conditions.test.ts covering:
  • Default of 1000 at QueryValidator level (boundary tests at 1000/1001)
  • Custom maxConditions passthrough via QueryConverter, CosmosCollection, and CosmosDataSource
  • Realistic chart scenarios (daily chart over 1 year, 3 filters × 365 days, weekly over 2 years)
  • QueryValidationError is instanceof ValidationError and passes BusinessError.isOfType check
• All 128 existing tests still pass

🤖 Generated with Claude Code

Note

Increase maxConditions default from 100 to 1000 in Cosmos datasource query validator

• Raises the default maxConditions limit in QueryValidator from 100 to 1000, fixing failures for queries with large condition trees (e.g. chart filters).
• Adds a maxConditions option to createCosmosDataSource, CosmosDataSource, and CosmosCollection so callers can override the limit.
• Changes QueryValidationError to extend ValidationError from @forestadmin/datasource-toolkit, so validation failures return HTTP 400 instead of 500.

^{Macroscope summarized 4cf51be.}