feat(server): dedup partition writes with per-group client table slices

[numinnex]

Implement deduplication for partition plane operations.

[numinnex]

Merge after #3958

[codecov]

Codecov Report

❌ Patch coverage is 89.34993% with 77 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.48%. Comparing base (a65f177) to head (5949b88).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
core/shard/src/lib.rs	73.72%	24 Missing and 7 partials ⚠️
core/partitions/src/iggy_partition.rs	82.22%	21 Missing and 3 partials ⚠️
core/partitions/src/state_transfer.rs	92.55%	3 Missing and 4 partials ⚠️
core/consensus/src/client_table.rs	98.07%	4 Missing ⚠️
core/consensus/src/impls.rs	85.18%	3 Missing and 1 partial ⚠️
core/consensus/src/lib.rs	0.00%	3 Missing ⚠️
core/server/src/dispatch.rs	95.12%	1 Missing and 1 partial ⚠️
core/simulator/src/lib.rs	95.65%	1 Missing ⚠️
foreign/go/internal/vsr/envelope.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3959      +/-   ##
============================================
- Coverage     83.93%   81.48%   -2.45%     
+ Complexity     1358     1356       -2     
============================================
  Files          1213     1214       +1     
  Lines        168441   160410    -8031     
  Branches     135999   128098    -7901     
============================================
- Hits         141373   130712   -10661     
- Misses        23389    25684    +2295     
- Partials       3679     4014     +335     

Components	Coverage Δ
Rust Core	81.76% <89.34%> (-2.96%)	⬇️
Java SDK	66.64% <100.00%> (-0.04%)	⬇️
C# SDK	75.06% <ø> (-1.46%)	⬇️
Python SDK	90.13% <ø> (ø)
PHP SDK	84.48% <ø> (ø)
Node SDK	95.90% <100.00%> (-0.01%)	⬇️
Go SDK	68.28% <0.00%> (-0.02%)	⬇️

Files with missing lines	Coverage Δ
core/configs/src/server_config/defaults.rs	100.00% <100.00%> (ø)
core/configs/src/server_config/partition.rs	96.49% <100.00%> (+0.61%)	⬆️
core/partitions/src/iggy_partitions.rs	88.42% <100.00%> (+0.62%)	⬆️
core/sdk/src/quic/quic_client.rs	75.07% <ø> (ø)
core/sdk/src/vsr.rs	94.23% <100.00%> (+0.32%)	⬆️
core/server/src/bootstrap.rs	79.58% <100.00%> (+0.22%)	⬆️
core/server/src/http/submit.rs	87.93% <100.00%> (+0.12%)	⬆️
core/server/src/partition_helpers.rs	75.16% <100.00%> (+0.05%)	⬆️
core/shard/src/router.rs	72.59% <100.00%> (-0.97%)	⬇️
core/simulator/src/client.rs	65.89% <ø> (ø)
... and 15 more

... and 217 files with indirect coverage changes

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