Use cron format for jobs (stats saving/digest)

[Jerboa-app]

Closes #84

[BurrowBot]

Seems the coverage is below main by -3.18 %, please consider adding to the tests, thanks!
Here is the full report breakdown

Total coverage 50.45 % (-3.18 % against main)
________________________________
src/main.rs                      | 0.0   % 0 / 15
src/server/api/stats.rs          | 0.0   % 0 / 81
src/server/http.rs               | 0.0   % 0 / 20
src/server/throttle.rs           | 0.0   % 0 / 48
src/server/stats/mod.rs          | 3.28  % 2 / 61
src/server/https.rs              | 5.71  % 4 / 70
src/task/mod.rs                  | 27.27 % 18 / 66
src/server/stats/hits.rs         | 42.31 % 33 / 78
src/lib.rs                       | 52.63 % 10 / 19
src/filesystem/folder.rs         | 61.11 % 33 / 54
src/server/stats/digest.rs       | 70.0  % 63 / 90
src/integrations/mod.rs          | 70.59 % 24 / 34
src/content/mod.rs               | 72.55 % 74 / 102
src/util.rs                      | 76.47 % 52 / 68
src/content/sitemap.rs           | 77.78 % 119 / 153
src/server/stats/file.rs         | 79.31 % 23 / 29
src/config.rs                    | 81.25 % 26 / 32
src/filesystem/file.rs           | 85.29 % 29 / 34
src/integrations/discord/post.rs | 90.0  % 9 / 10
src/content/filter.rs            | 100.0 % 3 / 3
src/content/mime_type.rs         | 100.0 % 30 / 30
src/integrations/webhook.rs      | 100.0 % 3 / 3
________________________________

[BurrowBot]

Seems the coverage is below main by -2.9 %, please consider adding to the tests, thanks!
Here is the full report breakdown

Total coverage 50.73 % (-2.9 % against main)
________________________________
src/main.rs                      | 0.0   % 0 / 15
src/server/api/stats.rs          | 0.0   % 0 / 81
src/server/http.rs               | 0.0   % 0 / 20
src/server/throttle.rs           | 0.0   % 0 / 48
src/server/stats/mod.rs          | 3.28  % 2 / 61
src/server/https.rs              | 5.71  % 4 / 70
src/task/mod.rs                  | 30.0  % 18 / 60
src/server/stats/hits.rs         | 42.31 % 33 / 78
src/lib.rs                       | 52.63 % 10 / 19
src/filesystem/folder.rs         | 61.11 % 33 / 54
src/server/stats/digest.rs       | 70.0  % 63 / 90
src/integrations/mod.rs          | 70.59 % 24 / 34
src/content/mod.rs               | 72.55 % 74 / 102
src/util.rs                      | 76.47 % 52 / 68
src/content/sitemap.rs           | 77.78 % 119 / 153
src/server/stats/file.rs         | 79.31 % 23 / 29
src/config.rs                    | 81.25 % 26 / 32
src/filesystem/file.rs           | 85.29 % 29 / 34
src/integrations/discord/post.rs | 90.0  % 9 / 10
src/content/filter.rs            | 100.0 % 3 / 3
src/content/mime_type.rs         | 100.0 % 30 / 30
src/integrations/webhook.rs      | 100.0 % 3 / 3
________________________________

[BurrowBot]

Seems the coverage is below main by -0.43 %, please consider adding to the tests, thanks!
Here is the full report breakdown

Total coverage 53.2 % (-0.43 % against main)
________________________________
src/main.rs                      | 0.0   % 0 / 15
src/server/api/stats.rs          | 0.0   % 0 / 81
src/server/http.rs               | 0.0   % 0 / 20
src/server/throttle.rs           | 0.0   % 0 / 48
src/server/https.rs              | 5.71  % 4 / 70
src/server/stats/mod.rs          | 27.87 % 17 / 61
src/server/stats/hits.rs         | 42.31 % 33 / 78
src/task/mod.rs                  | 50.0  % 30 / 60
src/lib.rs                       | 52.63 % 10 / 19
src/filesystem/folder.rs         | 61.11 % 33 / 54
src/server/stats/digest.rs       | 70.0  % 63 / 90
src/integrations/mod.rs          | 70.59 % 24 / 34
src/content/mod.rs               | 72.55 % 74 / 102
src/util.rs                      | 76.47 % 52 / 68
src/content/sitemap.rs           | 77.78 % 119 / 153
src/server/stats/file.rs         | 79.31 % 23 / 29
src/config.rs                    | 81.25 % 26 / 32
src/filesystem/file.rs           | 85.29 % 29 / 34
src/integrations/discord/post.rs | 90.0  % 9 / 10
src/content/filter.rs            | 100.0 % 3 / 3
src/content/mime_type.rs         | 100.0 % 30 / 30
src/integrations/webhook.rs      | 100.0 % 3 / 3
________________________________

[BurrowBot]

Looks like you increased coverage by 0.86 %, fantastic!
Here is the full report breakdown

Total coverage 54.49 % (+0.86 % against main)
________________________________
src/main.rs                      | 0.0   % 0 / 15
src/server/api/stats.rs          | 0.0   % 0 / 81
src/server/http.rs               | 0.0   % 0 / 20
src/server/throttle.rs           | 0.0   % 0 / 48
src/server/https.rs              | 5.71  % 4 / 70
src/server/stats/mod.rs          | 27.87 % 17 / 61
src/server/stats/hits.rs         | 42.31 % 33 / 78
src/lib.rs                       | 52.63 % 10 / 19
src/filesystem/folder.rs         | 61.11 % 33 / 54
src/server/stats/digest.rs       | 70.0  % 63 / 90
src/integrations/mod.rs          | 70.59 % 24 / 34
src/content/mod.rs               | 72.55 % 74 / 102
src/task/mod.rs                  | 74.14 % 43 / 58
src/util.rs                      | 76.47 % 52 / 68
src/content/sitemap.rs           | 77.78 % 119 / 153
src/server/stats/file.rs         | 79.31 % 23 / 29
src/config.rs                    | 81.25 % 26 / 32
src/filesystem/file.rs           | 85.29 % 29 / 34
src/integrations/discord/post.rs | 90.0  % 9 / 10
src/content/filter.rs            | 100.0 % 3 / 3
src/content/mime_type.rs         | 100.0 % 30 / 30
src/integrations/webhook.rs      | 100.0 % 3 / 3
________________________________