Bump langchain-tests from 1.1.6 to 1.1.9 in /libs/langchain-mongodb (#394)

Bumps [langchain-tests](https://github.com/langchain-ai/langchain) from
1.1.6 to 1.1.9.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/langchain-ai/langchain/releases">langchain-tests's
releases</a>.</em></p>
<blockquote>
<h2>langchain-tests==1.1.9</h2>
<p>Changes since langchain-tests==1.1.8</p>
<p>release(standard-tests): 1.1.9 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37609">#37609</a>)
test(standard-tests): allow extra content blocks in streaming assertions
(<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37592">#37592</a>)
chore: bump idna from 3.11 to 3.15 in /libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37536">#37536</a>)
chore: bump the minor-and-patch group across 3 directories with 15
updates (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37515">#37515</a>)
ci(infra): harden Dependabot version-bound preservation (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37510">#37510</a>)</p>
<h2>langchain-tests==1.1.8</h2>
<p>Changes since langchain-tests==1.1.7</p>
<p>hotfix(standard-tests): set <code>langchain-core</code> version
bounds (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37509">#37509</a>)
hotfix: bump lockfiles (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37508">#37508</a>)
release(standard-tests): 1.1.8 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37507">#37507</a>)
test(standard-tests): assert <code>ls_model_name</code> honors per-call
model override (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37504">#37504</a>)
chore(core,langchain,openai): refresh stale OpenAI model references (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37487">#37487</a>)
chore: bump langsmith from 0.7.31 to 0.8.0 in /libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37381">#37381</a>)
chore(infra): merge v1.4 into master (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37350">#37350</a>)
chore: bump urllib3 from 2.6.3 to 2.7.0 in /libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37324">#37324</a>)
chore: bump langchain-core from 1.3.2 to 1.3.3 in /libs/standard-tests
(<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37253">#37253</a>)
chore: bump types-pyyaml from 6.0.12.20250915 to 6.0.12.20260408 in
/libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37125">#37125</a>)
chore(docs): update x handle references (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37081">#37081</a>)</p>
<h2>langchain-tests==1.1.7</h2>
<p>Changes since langchain-tests==1.1.6</p>
<p>release(standard-tests): 1.1.7 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37067">#37067</a>)
hotfix: bump min core versions (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36996">#36996</a>)
feat(core): add content-block-centric streaming (v2) (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36834">#36834</a>)
chore: bump langsmith from 0.6.3 to 0.7.31 in /libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36799">#36799</a>)
chore(deps): bump pytest to <code>9.0.3</code> (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36801">#36801</a>)
chore: bump pytest from 9.0.2 to 9.0.3 in /libs/standard-tests (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/36715">#36715</a>)</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/langchain-ai/langchain/commit/ebc1880444afac3d4d51fd199aa33dd1e2188045"><code>ebc1880</code></a>
release(standard-tests): 1.1.9 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37609">#37609</a>)</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/22575adba4573e3107c405fd4f648690c0d50d3a"><code>22575ad</code></a>
test(standard-tests): allow extra content blocks in streaming assertions
(<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37">#37</a>...</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/1aa4496fb4ec1a18973ddaa5925dcadc2fdd9f4f"><code>1aa4496</code></a>
feat(langchain): register stream transformers on middleware (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37591">#37591</a>)</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/d2931d878fd39f9dcfef78911056ecef3271ee71"><code>d2931d8</code></a>
release(fireworks): 1.4.1 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37603">#37603</a>)</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/3c4cb503a069ca1b358cc240c4308b82610ae55e"><code>3c4cb50</code></a>
fix(fireworks): retry on bare <code>APIConnectionError</code>, default
<code>max_retries=2</code> (...</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/9545d058823b38421f943edd4ff1407e199fecb3"><code>9545d05</code></a>
test(fireworks): stabilize integration tests with rate limiting and
retries (...</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/515f1f4536a648438ca889f878e927cdd32e122b"><code>515f1f4</code></a>
test(openai): unbreak audio chat and Azure embedding integration tests
(<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37589">#37589</a>)</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/4d2efcd7560666080a4253c1d860adb318789cb8"><code>4d2efcd</code></a>
test(mistralai): stabilize integration tests with rate limiting and
retries (...</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/5197dd5985136716d346b4be97d2aeb31cedc636"><code>5197dd5</code></a>
release(fireworks): 1.4.0 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37582">#37582</a>)</li>
<li><a
href="https://github.com/langchain-ai/langchain/commit/d39950cb18c14ad85671e4b28c42c6f681b0446d"><code>d39950c</code></a>
feat(fireworks): migrate to <code>fireworks-ai</code> 1.x SDK (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/37581">#37581</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/langchain-ai/langchain/compare/langchain-tests==1.1.6...langchain-tests==1.1.9">compare
view</a></li>
</ul>
</details>
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