Add ECS and pretty print log formatters

[gondek]

I opted to write these log formatters manually, as I want to avoid adding additional composer dependencies for now until we do a security review.

In development, logs will look like:

In prod (or by default), logs will look like:

app-1  | {"@timestamp":"2026-02-13T20:20:59.849750Z","log.level":"info","message":"Accessing users::index","transaction.id":"743f9d17-e02a-4e22-b4e6-fbe805340518","ecs.version":"8.17.0","user.id":"34","user.name":"admin1"}
app-1  | {"@timestamp":"2026-02-13T20:21:00.282329Z","log.level":"info","message":"Accessing evaltools::index","transaction.id":"7f412068-da31-44b7-990c-6bd902258f81","ecs.version":"8.17.0","user.id":"34","user.name":"admin1"}
app-1  | {"@timestamp":"2026-02-13T20:21:14.301406Z","log.level":"info","message":"Accessing guard::logout","transaction.id":"28dc57f9-bb7d-47cb-8f1b-b8cefce928b2","ecs.version":"8.17.0","user.id":"34","user.name":"admin1"}
app-1  | {"@timestamp":"2026-02-13T20:21:14.303126Z","log.level":"info","message":"User admin1 logged out","transaction.id":"28dc57f9-bb7d-47cb-8f1b-b8cefce928b2","ecs.version":"8.17.0","user.id":"34","user.name":"admin1"}
app-1  | {"@timestamp":"2026-02-13T20:21:14.326872Z","log.level":"info","message":"Accessing guard::login","transaction.id":"110b1dca-70ee-442f-840d-6d27e0de6fb0","ecs.version":"8.17.0"}

[xcompass]

LGTM