fix: 26743: 0.77 snapshots cannot be loaded, unknown data source meta…

[artemananiev]

Fix summary: a part of #26514 is reverted. "Hashes RAM/disk threshold" field in MerkleDb data source metadata is now ignored rather than considered an unknown field.

Fixes: #26743
Signed-off-by: Artem Ananev artem.ananev@hashgraph.com

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[lfdt-bot]

✅ Snyk checks have passed. No issues have been found so far.

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✅	Open Source Security	0	0	0	0	0 issues

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[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
.../java/com/swirlds/merkledb/MerkleDbDataSource.java	33.33%	1 Missing and 1 partial ⚠️

@@            Coverage Diff            @@
##               main   #26744   +/-   ##
=========================================
  Coverage     70.47%   70.48%           
+ Complexity    11673    11672    -1     
=========================================
  Files          2579     2579           
  Lines        108277   108280    +3     
  Branches      12100    12101    +1     
=========================================
+ Hits          76313    76322    +9     
+ Misses        27986    27976   -10     
- Partials       3978     3982    +4     

Files with missing lines	Coverage Δ	Complexity Δ
.../java/com/swirlds/merkledb/MerkleDbDataSource.java	82.35% <33.33%> (-0.30%)	0.00 <0.00> (ø)

... and 8 files with indirect coverage changes

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[artemananiev]

This PR will be retargeted from main to release/0.78 as soon as that branch is created. No changes are needed in 0.79

[testlens-app]

🔎 No tests executed 🔎

🏷️ Commit: 6db98db
▶️ Tests: 0 executed
⚪️ Checks: 13/13 completed

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[artemananiev]

The fix for release 0.78 is tracked in the following PR: #26789 No changes are needed to main, so this PR can be closed.