commit 41a58d4f8fc3debc1552d8a5e4e604b3268e2a8d
author Brandon Kim <brandonkim@google.com> Fri Sep 06 06:49:42 2024 +0000
committer Brandon Kim <brandonkim@google.com> Fri Sep 06 07:35:53 2024 +0000
tree ae61b1613bf5fe73f1e769147896303559e9b6cb
parent 951742566fa7174f1d99fc7f33e6c942272d12de

external_storer: Add a log entry limit

This is to ensure that we don't get uncapped log entries. Default is set
to the first 20 logs being saved, and the next 980 being in a circualr
queue (1000 entries in total).

Tested:
Added unit test to ensure that the queue works as intended. Also
verified by injecting 1000 entries to ensure that the buffer indeed
saves the first 20, and caps it 1000.

```
//LogEntry1:
Created: ...Entries/66a97808-1e22-4c1e-b0f6-4b9eb7c714e7/index.json
...
//LogEntry20:
Created: ...Entries/9c07937a-9524-40f1-acef-19db73b46678/index.json
//LogEntry21:
Created: ...Entries/0bfb7ede-8020-4613-bfcf-5815ca176c79/index.json
...
//LogEntry1001:
Removed: ...Entries/0bfb7ede-8020-4613-bfcf-5815ca176c79
Created: ...Entries/31bdf3be-1e87-4e77-922d-9bbac09ac824/index.json
```

We can see that starting on the 1001st log, log entry 21 is deleted to
make room.

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: Ic2badd7f01741d788cad829c9e203b7c4962fc8e