We have a few things in the staging queue. Built a new Identity image
Git log since 0.39:
```
bc33b61bcc [identity] Bump NONCE_TTL_DURATION to 15min
929292d870 [identity] Add exponential backoff to upload_one_time_keys
24a3b86ed9 [identity] Add exponential backoff to refresh_user_prekeys
c90015c9f4 [identity] Send RETRY for transaction conflicts
a16ecd11a9 [identity] Use short aliases in handle_db_error
81d24474b5 Remove na from reserved users (#314)
e2f9c9a9db [identity] Treat empty auth metadata as invalid CSAT
e4f6df2e06 [identity] Validate username prefix queries with identity search
```