fix(cubesql): Use writable streams with plain objects instead of JSON…

[paveltiunov]

….stringify pipe for streaming capability

Check List

• Tests has been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required

[codecov]

Codecov Report

Patch coverage: 51.51% and project coverage change: -0.04 ⚠️

Comparison is base (d74a1f0) 68.17% compared to head (ea4a85c) 68.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6306      +/-   ##
==========================================
- Coverage   68.17%   68.13%   -0.04%     
==========================================
  Files         301      301              
  Lines       49689    49738      +49     
  Branches     5196     5196              
==========================================
+ Hits        33873    33887      +14     
- Misses      14983    15018      +35     
  Partials      833      833              

Flag	Coverage Δ
cube-backend	42.76% <100.00%> (-0.01%)	⬇️
cubesql	85.53% <46.66%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rust/cubesql/cubesql/src/compile/test/mod.rs	92.00% <ø> (ø)
rust/cubesql/cubesql/src/transport/service.rs	86.48% <ø> (ø)
rust/cubesql/cubesql/src/compile/engine/df/scan.rs	60.83% <46.66%> (-5.15%)	⬇️
...-query-orchestrator/src/orchestrator/QueryCache.ts	73.75% <100.00%> (-0.63%)	⬇️

... and 2 files with indirect coverage changes

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