Feature/parallel embeddings

[jackraymond]

A composite for parallelizing job submissions across structured samplers (i.e. the QPU)

Using minorminer sublattice mappings, this composite should allow us to mark the TilingComposite as deprecated, tiling is a special case of the functionality supported (see examples and tests - all tests passed by TilingComposite are emulated in the new code)

Closes several open issues including tiling support for Zephyr (Adv2) :
#456
#180
#213
It provides an enhanced solution to some other closed cases, like support for advantage: #213

[jackraymond]

Tests require this recently integrated bugfix: dwavesystems/minorminer@e40339a, I haven't modified the requirements accordingly.

[jackraymond]

Add Gunnar Millar @gunnarmillar to our team. I'd like him to take a stab at this. Other reviewers welcome. I'd like this functionality to be available for the AQC workshop June 13th (ideally the final practice May 26th).

[jackraymond]

@JoelPasvolsky This code is already used in the first draft of the AQC workshop repo.

[jackraymond]

Suggested change

	# Copyright 2018 D-Wave Systems Inc.
	# Copyright 2025 D-Wave

[jackraymond]

Examples were edited in the wrong place. See the sample() Examples, which will be moved here next commit.

[randomir]

The code looks really good. I did a thorough pass over the code and docs. Tomorrow I'll go over the tests.

To fix the CI, you should update minorminer in requirements.txt to 0.2.18 (version with parallel embeddings).

[randomir]

@jackraymond, the PR is rebased and cleaned-up.

I reviewed the tests, they LGTM, except the three that are failing (check the CI output). Once you fix those tests, we can merge and release.

[jackraymond]

@jackraymond, the PR is rebased and cleaned-up.

I reviewed the tests, they LGTM, except the three that are failing (check the CI output). Once you fix those tests, we can merge and release.

The failing tests are because it relies on code in the most recent master of minorminer, but missing from minorminer 0.2.18

[codecov]

Codecov Report

Attention: Patch coverage is 97.61905% with 2 lines in your changes missing coverage. Please review.

Project coverage is 86.87%. Comparing base (d611fdb) to head (5f581c9).
Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
dwave/system/composites/parallel_embeddings.py	97.59%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #569      +/-   ##
==========================================
- Coverage   88.91%   86.87%   -2.05%     
==========================================
  Files          21       22       +1     
  Lines        1904     1988      +84     
==========================================
+ Hits         1693     1727      +34     
- Misses        211      261      +50     

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