Diagnostic data present in Browser

[mostlyobvious]

A subpage in Browser could summarize useful information in terms of diagnostics:

• RES release version (already in the footer but can be moved or duplicated)
• total number of events
• total number of streams
• repository adapter (optionally RDBMS used as well)

I'd also consider letting one voluntarily and anonymously submit this particular data to maintainers (google form or similar) to have better insight what a typical RES deployment looks like. Obviously being extremely precise what is sent and what code is responsible for that.

[mostlyobvious]

Possibly knowing a platform (Heroku or AWS) could be helpful for us to optimize overall RES experience.

[mostlyobvious]

It could be useful to inspect database schema (if RDBMS present)

[swistak35]

I'm not sure what information we could retrieve, having in consideration that we would like to have some useful data from maintainers perspective and don't loose trust by executing doubtful sql/shell scripts:

• RES version (easy and not problematic)
• Repository name (rather easy, at least sharing the class name)
• RDBMS used, in case of RailsEventStoreActiveRecord (probably easy, by looking at adapter used by active record?)
• infrastructure provider used (Heroku probably can be detected by looking at ENVs [ https://devcenter.heroku.com/articles/dyno-metadata ]: that's probably ok; EngineYard looks like could be identified by looking at binaries in /usr/local/bin, but this is IMO something which I would not like to see in event store library)
• whether the instance of event store has LinkByCausationId, LinkByCorrelationId or LinkByEventType in global handlers
• information about which of dispatchers, from the ones we are providing, are used (especially whether people are using ActiveJob dispatcher or not) -- we probably don't care about custom ones
• similarly with mappers, especially EncryptionMapper and Protobuf