feat(shard): split the inbox into consensus and client-reply lanes

[numinnex]

No description provided.

[numinnex]

merge after #3911

[codecov]

Codecov Report

❌ Patch coverage is 90.52133% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.85%. Comparing base (565e1a7) to head (01afb4a).

Files with missing lines	Patch %	Lines
core/server/src/dispatch.rs	94.11%	0 Missing and 5 partials ⚠️
core/configs/src/server_config/sharding.rs	66.66%	4 Missing ⚠️
core/server/src/bootstrap.rs	80.00%	4 Missing ⚠️
core/shard/src/router.rs	80.00%	3 Missing ⚠️
core/simulator/src/lib.rs	89.47%	2 Missing ⚠️
core/server/src/partition_reconciler.rs	94.44%	1 Missing ⚠️
core/shard/src/builder.rs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #3915       +/-   ##
=============================================
- Coverage     83.82%   70.85%   -12.98%     
  Complexity     1358     1358               
=============================================
  Files          1212     1211        -1     
  Lines        166582   152042    -14540     
  Branches     134056   119641    -14415     
=============================================
- Hits         139632   107722    -31910     
- Misses        23312    40575    +17263     
- Partials       3638     3745      +107     

Components	Coverage Δ
Rust Core	68.02% <90.52%> (-16.57%)	⬇️
Java SDK	66.67% <ø> (ø)
C# SDK	74.99% <ø> (-1.56%)	⬇️
Python SDK	90.00% <ø> (ø)
PHP SDK	84.48% <ø> (ø)
Node SDK	95.94% <ø> (ø)
Go SDK	68.32% <ø> (ø)

Files with missing lines	Coverage Δ
core/server/src/server_error.rs	61.40% <ø> (ø)
core/shard/src/coordinator.rs	92.29% <100.00%> (-0.23%)	⬇️
core/shard/src/lib.rs	81.18% <100.00%> (+0.09%)	⬆️
core/simulator/src/replica.rs	96.68% <100.00%> (+0.04%)	⬆️
core/server/src/partition_reconciler.rs	97.77% <94.44%> (-0.10%)	⬇️
core/shard/src/builder.rs	90.82% <75.00%> (+0.25%)	⬆️
core/simulator/src/lib.rs	97.11% <89.47%> (-0.08%)	⬇️
core/shard/src/router.rs	73.56% <80.00%> (+0.28%)	⬆️
core/configs/src/server_config/sharding.rs	94.02% <66.66%> (-1.74%)	⬇️
core/server/src/bootstrap.rs	80.78% <80.00%> (+0.20%)	⬆️
... and 1 more

... and 289 files with indirect coverage changes

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