When an indexer is in-sync it will stop actively asking for
new blocks, so the block updates (Hub saying they found a new block)
will then allow the indexer to keep up-to-date
This adds lots of little things;
* Add GetTransaction API call
* I refactored the GetBlock API a little to reuse code.
* a new 'Version' API call for the hub
* API for the logging manager, so we can set a default
setup with just C++-APIs
* various (usability) fixes in the FloweeServiceApplication
* Binding to localhost attempts to bind to both IPv4 and v6
* Print the actual transaction hex from indexer-cli (which really
is just a testing app)