Telemetry: Add mount, beforeEach, moduleMock stats

[shilman]

Closes N/A
Telescopes on #28622

What I did

Add stats on CSF feature usage

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

Run a sandbox with STORYBOOK_TELEMETRY_DEBUG=1 and observe the payload with the number of mount/beforeEach/moduleMock counts when you use those CSF features.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=<PR_NUMBER>

name	before	after	diff	z	%
createSize	0 B	0 B	0 B	-	-
generateSize	76.5 MB	76.5 MB	0 B	1.07	0%
initSize	198 MB	198 MB	1.46 kB	1.78	0%
diffSize	121 MB	121 MB	1.46 kB	1.85	0%
buildSize	7.6 MB	7.6 MB	0 B	1.53	0%
buildSbAddonsSize	1.63 MB	1.63 MB	0 B	1.31	0%
buildSbCommonSize	195 kB	195 kB	0 B	-	0%
buildSbManagerSize	2.3 MB	2.3 MB	0 B	1.53	0%
buildSbPreviewSize	349 kB	349 kB	0 B	1.22	0%
buildStaticSize	0 B	0 B	0 B	-	-
buildPrebuildSize	4.47 MB	4.47 MB	0 B	1.53	0%
buildPreviewSize	3.12 MB	3.12 MB	0 B	1.11	0%
testBuildSize	0 B	0 B	0 B	-	-
testBuildSbAddonsSize	0 B	0 B	0 B	-	-
testBuildSbCommonSize	0 B	0 B	0 B	-	-
testBuildSbManagerSize	0 B	0 B	0 B	-	-
testBuildSbPreviewSize	0 B	0 B	0 B	-	-
testBuildStaticSize	0 B	0 B	0 B	-	-
testBuildPrebuildSize	0 B	0 B	0 B	-	-
testBuildPreviewSize	0 B	0 B	0 B	-	-

name	before	after	diff	z	%
createTime	22.9s	23.5s	574ms	1.41	2.4%
generateTime	20.9s	21.7s	812ms	-0.58	3.7%
initTime	21.2s	22.5s	1.3s	-0.79	5.8%
buildTime	13.6s	13.1s	-499ms	-1.5	-3.8%
testBuildTime	0ms	0ms	0ms	-	-
devPreviewResponsive	9.8s	8s	-1s -824ms	-0.75	-22.7%
devManagerResponsive	6s	5.3s	-713ms	-0.88	-13.3%
devManagerHeaderVisible	778ms	939ms	161ms	0.51	17.1%
devManagerIndexVisible	784ms	942ms	158ms	0.37	16.8%
devStoryVisibleUncached	1.4s	1.5s	109ms	1.09	7.1%
devStoryVisible	822ms	1s	183ms	0.57	18.2%
devAutodocsVisible	810ms	745ms	-65ms	-0.08	-8.7%
devMDXVisible	795ms	785ms	-10ms	0.56	-1.3%
buildManagerHeaderVisible	847ms	756ms	-91ms	-0.41	-12%
buildManagerIndexVisible	852ms	762ms	-90ms	-0.39	-11.8%
buildStoryVisible	901ms	812ms	-89ms	-0.39	-11%
buildAutodocsVisible	855ms	706ms	-149ms	-0.46	-21.1%
buildMDXVisible	687ms	696ms	9ms	-0.19	1.3%

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[tmeasday]

LGTM, not sure if we can make the regexp slighly tighter?

[greptile-apps]

PR Summary

• Added telemetry tracking for mount, beforeEach, and moduleMock in /code/core/src/csf-tools/CsfFile.ts
• Updated tests to cover new telemetry features in /code/core/src/csf-tools/CsfFile.test.ts
• Enhanced telemetry data capture in /code/core/src/core-server/utils/StoryIndexGenerator.test.ts
• Modified IndexInputStats interface to include new telemetry properties in /code/core/src/types/modules/indexer.ts

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