oxen::log::info(...), etc. are a bit too verbose; this simplifies them
to just `log::info(...)`, etc. by aliasing the `oxen::log` namespace
into most of the common namespaces we use in core.
This result is usage that is shorter but also reads better:
oxen::log::info(logcat, "blah: {}", 42);
log::info(logcat, "blah: {}", 42);
This replaces the current epee logging system with our oxen::log
library. It replaces the easylogging library with spdlog, removes the
macros and replaces with functions and standardises how we call the
logs.
The important part here is removing this line:
if (swarm_to_snodes.size() == 1) return MAX_ID / 2;
because, if we end up in a case where we have only one swarm and it
*already* has that ID (e.g. create 2, which will be [MAX/2,0] then drop
0) then this returns a swarm_id that already exists, which is bad
because then we fail to insert the new swarm, a service node gets left
with an unassigned swarm id, and that then causes issues in SS because
that node thinks it is deactivated because it doesn't have a swarm id
(yet it *is* in the active nodes list, so other network members still
try to talk to it).
This adds a thread-local, pre-seeded rng at `tools::rng` (to avoid the
multiple places we are creating + seeding such an RNG currently).
This also moves the portable uniform value and generic shuffle code
there as well as neither function is specific to service nodes and this
seems a logical place for them.
* unit tests and core tests for new queueless swarm assignment logic
* new bufferless swarm assignment logic
* new lines
* Address reviews
* Improve node stealing logic
* unit tests for additional functions
* get_excess_pool to return early if the threshold is lower than MIN_SWARM_SIZE
* Address reviews
* another round of reviews
* Move new_swarm_vector inside loop
* Rebase changes: moved get_new_swarm_id to service_node_swarm.cpp
* reserve vector size for all_ids in get_new_swarm_id
