Metadata stored in file chunks for better performance, max file size control

[wasm-forge]

• better performance with metadata being stored insize v2 chunks
• max file size control (disallow writing beyond specified size for usual and for the mounted memory files)

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 91.75865% with 112 lines in your changes missing coverage. Please review.

Project coverage is 91.93%. Comparing base (2682773) to head (a3fe6e6).

Files with missing lines	Patch %	Lines
src/storage/stable.rs	91.64%	41 Missing ⚠️
src/integration_tests.rs	50.00%	25 Missing ⚠️
src/storage/metadata_provider.rs	94.90%	13 Missing ⚠️
src/storage/transient.rs	87.09%	12 Missing ⚠️
src/fs.rs	98.05%	7 Missing ⚠️
src/runtime/structure_helpers.rs	88.46%	3 Missing ⚠️
src/storage/dummy.rs	83.33%	3 Missing ⚠️
src/runtime/dir.rs	81.81%	2 Missing ⚠️
src/runtime/file.rs	75.00%	2 Missing ⚠️
src/storage/types.rs	0.00%	2 Missing ⚠️
... and 2 more

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #20      +/-   ##
==========================================
- Coverage   92.45%   91.93%   -0.52%     
==========================================
  Files          18       18              
  Lines        6271     6959     +688     
==========================================
+ Hits         5798     6398     +600     
- Misses        473      561      +88     

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