Non-square FusedGradedMatrix

[lkdvos]

Refactors FusedGradedMatrix and FusedGradedVector to support rectangular (non-square) block structures with asymmetric codomain/domain sectors.

• Storage model: replaces the single sectors::Vector + blocks::Vector block-diagonal layout with Dictionary{S,Int} axes (codomain, domain / axis) plus a Dictionary{S,D} of stored blocks keyed only at sectors common to both axes.
• Drops insert_missing_sectors / delete_missing_sectors: matricize/unmatricize no longer needs to pad with multiplicity-0 sectors to force matching codomain/domain
• Bumps to v0.9 since probably should be considered breaking

[codecov]

Codecov Report

❌ Patch coverage is 80.14706% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.52%. Comparing base (e9d7e0d) to head (5857ac6).

Files with missing lines	Patch %	Lines
src/fusedgradedvector.jl	23.52%	39 Missing ⚠️
src/fusedgradedmatrix.jl	88.42%	11 Missing ⚠️
src/matrixalgebrakit.jl	96.61%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #167      +/-   ##
==========================================
- Coverage   82.00%   81.52%   -0.49%     
==========================================
  Files          22       22              
  Lines        1523     1597      +74     
==========================================
+ Hits         1249     1302      +53     
- Misses        274      295      +21     

Flag	Coverage Δ
docs	0.00% <0.00%> (ø)

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[lkdvos]

It also looks like the documenter workflow is not correctly instantiating the environment somehow

[mtfishman]

It also looks like the documenter workflow is not correctly instantiating the environment somehow

Hmm I've been making a lot of changes to workflows, maybe something broke, I'll look into it...

[lkdvos]

Hmmm, it might have also just been the compat things, it seems to have sorted itself out now?

Here are the ones that failed:

https://github.com/ITensor/GradedArrays.jl/actions/runs/25340068435
https://github.com/ITensor/GradedArrays.jl/actions/runs/25340160415

I think I got mostly confused because the failing resolver didn't cancel the remainder of the workflow