No diagnostics for the first file opened with neovim

[gergaly]

Describe the bug
Diagnostics are not run for the first file because 'textDocument/didOpen' arrived before initial indexing is done.

To Reproduce
Start neovim with an erlang file.

Expected behavior
The file diagnostics requests should be handled during initial indexing. Two possible ways:

1. Cancel request and give the LSP client a chance to resend the request later
2. Queue the requests and process them after the initial indexing is done.

Actual behavior
Diagnostics are not run for the first file during the session and a log message is issued:

[2025-01-07T11:17:31.798810+01:00] [info] Initial indexing is not done, skip running diagnostics for imagine_module_name_here [els_diagnostics:run_diagnostics/1 L124] <0.153.0>

Context

• erlang_ls version (tag/sha): 1.1.0
• Editor used: neovim 0.10.2
• LSP client used: neovim, lazy.nvim and nvim-lspconfig

[gergaly]

My proof of concept fix for the "Queue requests" way:
main...gergaly:erlang_ls:delay