feat: user feedback reports

[bobbyg603]

Release as bugsplat@9.0.0 — dependent SDKs (bugsplat-ng, bugsplat-react, bugsplat-node) have matching PRs on feature/user-feedback that require this version.

Summary

This is a breaking change.

• Migrates post() from direct /post/js/ endpoint to the presigned URL upload flow (getCrashUploadUrl → S3 PUT → commitS3CrashUpload), matching postFeedback()
• Adds attributes as a first-class option (Record<string, string>) on BugSplatOptions with setDefaultAttributes() — no more passing { key: 'attributes', value: '...' } via additionalFormDataParams
• Adds attachments as a first-class option on BugSplatOptions for both post() and postFeedback() — typed as BugSplatAttachment[]
• Removes additionalFormDataParams from the public API entirely
• Removes FormDataParam type and form-data-param.ts
• Unifies BugSplatOptions — removes BugSplatFeedbackOptions (both methods now share a single options interface)
• Unifies response types — BugSplatResponseBody now reflects the commit endpoint shape (crashId, stackKeyId, messageId, infoUrl) instead of the old /post/js/ shape (crash_id, current_server_time, message)
• Extracts shared _upload() private method to eliminate duplication between post() and postFeedback()
• Replaces BUGSPLAT_CRASH_POST_URL env var with BUGSPLAT_BASE_URL

Breaking changes

Before	After
additionalFormDataParams: [{ key: 'attributes', value: '{"foo":"bar"}' }]	attributes: { foo: 'bar' }
additionalFormDataParams: [{ key: name, value: blob, filename: name }]	attachments: [{ filename: name, data: blob }]
result.response.crash_id	result.response.crashId
result.response.current_server_time	(removed)
result.response.message	(removed)
result.response.url	result.response.infoUrl
import { FormDataParam }	(removed)
import { BugSplatFeedbackOptions }	Use BugSplatOptions instead

Dependent SDK PRs

These PRs on feature/user-feedback consume the breaking changes above:

• bugsplat-ng — BugSplat-Git/bugsplat-ng
• bugsplat-react — BugSplat-Git/bugsplat-react
• bugsplat-node — BugSplat-Git/bugsplat-node

Test plan

• Run unit tests: npx vitest run spec/bugsplat.spec.ts
• Run e2e tests against fred database: npx vitest run spec/bugsplat.e2e.spec.ts
• Verify crash reports appear in BugSplat dashboard with correct attributes
• Verify feedback reports appear in BugSplat dashboard with correct attributes and attachments

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