Author merge failures (redirects, etc)

I know there was an issue about failing author merges, but I can't find it.
### Evidence / Screenshot (if possible)


### Relevant url?
https://openlibrary.org/authors/OL6736985A/Lucy_Leffingwell_Cable_Bikl%C3%A9?duplicates=OL2225567A,OL5767240A,OL6636018A,OL3665163A

### Steps to Reproduce

1. Go to the url
2. Do click it

* Actual: Error saying "That merge didn't work. It's our fault, and we've made a note of it."
* Expected: Merged author record

### Details

- **Logged in (Y/N)?**
- **Browser type/version?**
- **Operating system?**
- **Environment (prod/dev/local)?** prod

### Proposal & Constraints

In addition to fixing the bug, I'm wondering if the error message is accurate. I've received hundreds (thousands?) of these and I've never seen any action taken as a result of this "note taking." Does someone actually review these and fix them? If not, perhaps the messaging should be changed to something more accurate.

### Related files

### Stakeholders

Start by reproducing the failure at the linked author URL in the production report, then trace the author-merge handling in the repository to identify where the redirect case fails. Done means the listed author records merge successfully and the resulting error message accurately reflects whether failures are recorded for follow-up.

Written by the indexing model from the issue text.