feat: sourcemaps

[daibhin]

Problem

In order to perform source map demangling we need sourcemaps

Changes

• Add an endpoint to upload sourcemaps (can be reused for customers CLI uploads)
• Use the new endpoint in the web app. Purely for testing functionality as we build, UI / UX will probably change before release

Does this work well for both Cloud and self-hosted?

Requires object storage to be enabled but otherwise yes

How did you test this code?

Added tests

[github-actions]

Size Change: +197 B (0%)

Total Size: 9.21 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	9.21 MB	+197 B (0%)

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

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[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.