Overhaul logging

[josecelano]

Relates to: torrust/torrust-tracker#687

Currently, the Index logs only include these lines

$ cargo run
   Compiling torrust-index v3.0.0-alpha.3-develop (/home/josecelano/Documents/git/committer/me/github/torrust/torrust-index)
    Finished dev [unoptimized + debuginfo] target(s) in 7.16s
     Running `target/debug/torrust-index`
Loading default configuration file: `./share/default/config/index.development.sqlite3.toml` ...
2024-02-12T12:44:44.175872075+00:00 [torrust_index::bootstrap::logging][INFO] logging initialized.
2024-02-12T12:44:44.216332590+00:00 [torrust_index::console::cronjobs::tracker_statistics_importer][INFO] Tracker statistics importer launcher started
2024-02-12T12:44:44.216362250+00:00 [torrust_index::web::api::server][INFO] Starting API server with net config: 0.0.0.0:3001 ...
2024-02-12T12:44:44.216445749+00:00 [torrust_index::console::cronjobs::tracker_statistics_importer][INFO] Tracker statistics importer cronjob starting ...
2024-02-12T12:44:44.216471329+00:00 [torrust_index::web::api::server][INFO] API server listening on http://0.0.0.0:3001
2024-02-12T12:44:44.216643798+00:00 [torrust_index::console::cronjobs::tracker_statistics_importer][INFO] Tracker statistics importer API server listening on http://127.0.0.1:3002
^C2024-02-12T12:46:32.787846488+00:00 [torrust_index::web::api::server][INFO] Stopping API server on http://0.0.0.0:3001 ...
2024-02-12T12:46:32.788022917+00:00 [torrust_index::web::api::server][INFO] API server stopped

...

index  | 2024-02-07T17:18:32.075025043+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 646 ...
index  | 2024-02-07T17:18:32.319068049+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2286 ...
index  | 2024-02-07T17:18:32.743514144+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2003 ...
index  | 2024-02-07T17:18:33.296387885+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 1266 ...
index  | 2024-02-07T17:18:34.119532766+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2626 ...
index  | 2024-02-07T17:18:35.243764475+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 845 ...
index  | 2024-02-07T17:18:35.611726442+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 1048 ...
index  | 2024-02-07T17:18:36.112736242+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2641 ...
index  | 2024-02-07T17:18:36.337050266+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2452 ...

from the Tracker Statistics Importer (cronjob).

• We should add at least logs for each API request (basic request and response). It would be very helpful to resolve issues like the ones described here.
• We should also use targets. See Improve logs: add target, identify running service, identify request torrust-tracker#600. That means to replace this line:

index  | 2024-02-07T17:18:36.337050266+00:00 [torrust_index::tracker::statistics_importer][INFO] Updating torrent 2452 ...

with:

index  | 2024-02-07T17:18:36.337050266+00:00 [tracker_statistics_importer][INFO] Updating torrent 2452 ...

[josecelano]

@da2ce7 suggested adding an ID to identify the request. For example a UUID.

[josecelano]

For the statistics_importer we could show:

• The total of torrents that are going to be imported before starting the execution.
• Time time spent importing all torrent statistics.