fix: file path normalization wasn't working right

[cheapsteak]

What kind of change does this PR introduce?

bugfix

Did you add tests for your changes?

yes

If relevant, link to documentation update:

Summary

following up to #214
We're currently generating confusing reports where the file names show up as the same but they're not compared against their previous version

It looks like we needed to perform normalization earlier than when analyze was called, since there's a call to bundlewatchService.saveFileDetailsForCurrentBranch before analyze is run

bundlewatch/src/app/index.js

Lines 31 to 42 in 57c71de

	const baseBranchFileDetails = await bundlewatchService.getFileDetailsForBaseBranch()
	await bundlewatchService.saveFileDetailsForCurrentBranch({
	fileDetailsByPath: currentBranchFileDetails,
	trackBranches: ci.trackBranches,
	})
	const results = analyze({
	currentBranchFileDetails,
	baseBranchFileDetails,
	baseBranchName: ci.repoBranchBase,
	normalizeFilenames,
	})

Does this PR introduce a breaking change?
No, the API is kept the same as before (any captured segments are removed)

Other information

[jakebolam]

@cheapsteak thank you 🙏