Check is blk alloced for normal volume write free blk.

[sanebay]

Check is blk alloced for normal volume write free blk.

In crash recovery case, volume write can write to index
and to disk and then crash. In this case index has stale
blk ids which are not alloced, but they can be freed next
time a write happens on same lba.
Ex: write on lba=100 with blk1, add blk1 in index. crash and restart(no journal write)
write again on lba=100 with blk2, get blk1 from index to free the old blks(this is not allocated at all because it was not commited)

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.80%. Comparing base (0b40663) to head (5259529).
⚠️ Report is 64 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib/volume/volume.cpp	0.00%	0 Missing and 2 partials ⚠️
src/lib/volume_mgr.cpp	0.00%	0 Missing and 2 partials ⚠️
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Additional details and impacted files

@@             Coverage Diff             @@
##             main     #158       +/-   ##
===========================================
- Coverage   61.68%   46.80%   -14.89%     
===========================================
  Files          15       16        +1     
  Lines         462     1126      +664     
  Branches       35      541      +506     
===========================================
+ Hits          285      527      +242     
- Misses        158      227       +69     
- Partials       19      372      +353     

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[shosseinimotlagh]

LG!