Add a visible revision history for published posts

Is your feature request related to a problem? Please describe.

Published posts can be edited after they go live, but readers currently have no straightforward way to see whether substantive changes were made.

Minor typo fixes generally do not matter, but changes to technical claims, code examples, statistics, or opinions can materially change what a reader is seeing compared with the original publication.

A visible revision history would improve transparency and accountability for substantial edits.

Describe the solution you'd like

Add an optional "View edit history" action to published posts.

The history could show:

• When a revision was made.
• A diff between the previous and current version.
• Which parts of the post changed.

Minor edits could remain unobtrusive, while substantial revisions would be visible to readers who want to inspect them.

Describe alternatives you've considered

• Relying on the author to manually disclose significant edits.
• Adding an "Edited" label without showing what changed.
• Keeping the existing behavior with no revision visibility.

These approaches provide less transparency than an actual revision history.

Additional context

I originally proposed this in my DEV post:

https://dev.to/dj29/5-devto-features-i-wish-existed-3-im-genuinely-relieved-they-dont-3b8n

The intent is not to discourage normal typo corrections, but to make substantive changes to published technical content transparent to readers.