* Omit Esql.* columns from ES|QL rule required_fields
Kibana treats required_fields as index mappings. ES|QL stats and
similar commands expose Esql.* and Esql_priv.* result columns that
are not mapped on source indices, which produced noisy validation
warnings for shipped rules.
Filter those names when building required_fields. Add a check in
test_esql_endpoint_alerts_index when remote ES|QL validation runs.
Fixes#6026.
* Move required_fields check to its own remote test
* Iterate production rules in required_fields test
* Use direct get_required_fields call in remote test
Skip to_api_format() and call data.get_required_fields(index) directly,
gated on ESQLRuleData. Mirrors the ESQLValidator scope of the fix and
avoids the unrelated packaging steps that to_api_format runs per rule.
* Bump version to 1.6.30
* Centralize ES|QL dynamic field prefix tuple
Define ESQL_DYNAMIC_FIELD_PREFIXES = ("Esql.", "Esql_priv.") in
schemas/definitions.py and reuse it in QueryValidator.get_required_fields,
ESQLValidator.validate_columns_index_mapping, and the remote test.
Single source of truth and consistent ordering across the codebase.
Mika Ayenson, PhD
cc66323d1d