[8.x] [Discover] Breakdown support for fieldstats (#199028)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [Discover] Breakdown support for fieldstats (#199028)

Questions ?

Please refer to the Backport tool documentation

[github-actions]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: c9b1ab0
• Kibana Serverless Image: docker.elastic.co/kibana-ci/kibana-serverless:pr-199780-c9b1ab07498b

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
aiops	624	625	+1
apm	1877	1878	+1
cloudSecurityPosture	648	662	+14
datasetQuality	240	276	+36
dataViewManagement	240	241	+1
dataVisualizer	734	735	+1
discover	971	972	+1
esqlDataGrid	356	370	+14
eventAnnotationListing	571	585	+14
lens	1470	1471	+1
logsExplorer	569	570	+1
logsShared	687	701	+14
maps	1243	1244	+1
observability	1055	1069	+14
presentationUtil	180	181	+1
securitySolution	6192	6193	+1
slo	841	855	+14
unifiedDocViewer	224	225	+1
unifiedSearch	375	376	+1
total			+132

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/esql-utils	72	74	+2
@kbn/field-utils	40	42	+2
@kbn/unified-field-list	286	288	+2
unifiedHistogram	37	35	-2
total			+4

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
aiops	580.7KB	581.1KB	+438.0B
apm	3.5MB	3.5MB	+438.0B
datasetQuality	251.9KB	252.6KB	+751.0B
discover	805.7KB	806.9KB	+1.2KB
lens	1.5MB	1.5MB	+438.0B
securitySolution	13.4MB	13.4MB	+884.0B
slo	851.9KB	852.8KB	+884.0B
unifiedHistogram	71.1KB	71.3KB	+151.0B
total			+5.1KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
unifiedHistogram	10.5KB	10.3KB	-261.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/esql-utils	81	83	+2
@kbn/field-utils	49	51	+2
@kbn/unified-field-list	315	317	+2
unifiedHistogram	72	70	-2
total			+4

History

• 💚 Build #250316 succeeded f83fd9b

cc @mohamedhamed-ahmed