Add event system and config parsing to device coupler

[codecov[bot]]

Codecov Report

Merging #942 (baa529c) into master (6d7d650) will decrease coverage by 0.66%. The diff coverage is 44.15%.

@@            Coverage Diff             @@
##           master     #942      +/-   ##
==========================================
- Coverage   82.52%   81.86%   -0.67%     
==========================================
  Files          45       47       +2     
  Lines        5701     5769      +68     
==========================================
+ Hits         4705     4723      +18     
- Misses        996     1046      +50     

Flag	Coverage Δ
ata	62.21% <44.15%> (-0.78%)	:arrow_down:
aux	67.39% <37.66%> (-0.40%)	:arrow_down:
base	65.62% <37.66%> (-0.25%)	:arrow_down:
dhcp	66.68% <37.66%> (-0.40%)	:arrow_down:
many	66.38% <37.66%> (-0.40%)	:arrow_down:
mud	71.27% <37.66%> (-0.59%)	:arrow_down:
switch	67.05% <44.15%> (-0.32%)	:arrow_down:
topo	65.80% <37.66%> (-0.43%)	:arrow_down:
unit	32.63% <12.98%> (-0.24%)	:arrow_down:

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Impacted Files	Coverage Δ
daq/proto/device_coupler_pb2.py	0.00% <0.00%> (ø)
daq/proto/device_coupler_pb2_grpc.py	0.00% <0.00%> (ø)
daq/proto/system_config_pb2.py	100.00% <ø> (ø)
daq/runner.py	84.06% <25.00%> (-1.70%)	:arrow_down:
daq/topology.py	95.29% <87.09%> (+0.01%)	:arrow_up:
daq/network.py	95.37% <100.00%> (ø)
daq/varz_state_collector.py	46.98% <0.00%> (-3.62%)	:arrow_down:
daq/traffic_analyzer.py	86.50% <0.00%> (-3.18%)	:arrow_down:
daq/host.py	90.92% <0.00%> (-0.15%)	:arrow_down:

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