* add session type based on ecash ticket collection
* avoid setting session type if already set
* change duration type to duration
* add a cap for finished sessions
* add stats model
* add stats collection
* add stats route
* propagate stuff and run stuff
* cargo stuff
* sqlx unused what?
* add sessions started stat
* session durations in miliseconds
* apply Jon's comments
* [Product Data] Second step in gateway usage data collection (#4964)
* turn stats collection into event based
* move events into a common crate for future use elsewhere
* apply Jon's comments
* Remove nym-network-statistics from workspace
* Remove nym-network-statistics
* Cargo.lock
* Update ci workflow
* Remove code that refers to removed nym-network-statistics
* Remove more
* Remove nym-statistics-common
* Delete commented out modules
* Remove commented out code
* Remove more commented out code
* Remove more commented out stuff
* Remove unused function
* Make gateway mnemonic optional
* Remove unnecessary timer struct
* Prepare for code reuse
* Use trait for stats collector
* Put trait definition in common crate
* Gateway stats runner
* Custom statistics url arg
* Build & send stats req to url
* Storage support for new stats type
* Make gateway stats opt in
* Test&clippy fixes
* CHANGELOG update
* Replace client address with service address
* Copy over the server parts of the statistics server
* Separate API in module
* Rename struct
* Add insertion endpoint
* Remove unused code from network requester
* Box big rocket error
* Remove the feature-specific code
* Construct http req
* Clippy + Cargo.lock update
* Re-added needed sqlx feature
* Wrap http req in ordered msg
* Add http headers
* Move common api functionality into the separate crate
* Make stats server address configurable, especially for testing
* Update changelog
* Fix clippy
* Help command update
Simon Wicky