Bump pytest-cov from 7.0.0 to 7.1.0 in /backend in the development-dependencies group (#396)

Bumps the development-dependencies group in /backend with 1 update:
[pytest-cov](https://github.com/pytest-dev/pytest-cov).

Updates `pytest-cov` from 7.0.0 to 7.1.0
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst">pytest-cov's
changelog</a>.</em></p>
<blockquote>
<h2>7.1.0 (2026-03-21)</h2>
<ul>
<li>
<p>Fixed total coverage computation to always be consistent, regardless
of reporting settings.
Previously some reports could produce different total counts, and
consequently can make --cov-fail-under behave different depending on
reporting options.
See <code>[#641](pytest-dev/pytest-cov#641)
&lt;https://github.com/pytest-dev/pytest-cov/issues/641&gt;</code>_.</p>
</li>
<li>
<p>Improve handling of ResourceWarning from sqlite3.</p>
<p>The plugin adds warning filter for sqlite3
<code>ResourceWarning</code> unclosed database (since 6.2.0).
It checks if there is already existing plugin for this message by
comparing filter regular expression.
When filter is specified on command line the message is escaped and does
not match an expected message.
A check for an escaped regular expression is added to handle this
case.</p>
<p>With this fix one can suppress <code>ResourceWarning</code> from
sqlite3 from command line::</p>
<p>pytest -W &quot;ignore:unclosed database in &lt;sqlite3.Connection
object at:ResourceWarning&quot; ...</p>
</li>
<li>
<p>Various improvements to documentation.
Contributed by Art Pelling in
<code>[#718](pytest-dev/pytest-cov#718)
&lt;https://github.com/pytest-dev/pytest-cov/pull/718&gt;</code>_ and
&quot;vivodi&quot; in
<code>[#738](pytest-dev/pytest-cov#738)
&lt;https://github.com/pytest-dev/pytest-cov/pull/738&gt;</code><em>.
Also closed
<code>[#736](pytest-dev/pytest-cov#736)
&lt;https://github.com/pytest-dev/pytest-cov/issues/736&gt;</code></em>.</p>
</li>
<li>
<p>Fixed some assertions in tests.
Contributed by in Markéta Machová in
<code>[#722](pytest-dev/pytest-cov#722)
&lt;https://github.com/pytest-dev/pytest-cov/pull/722&gt;</code>_.</p>
</li>
<li>
<p>Removed unnecessary coverage configuration copying (meant as a backup
because reporting commands had configuration side-effects before
coverage 5.0).</p>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/66c8a526b1246b5eb8fb1bc218878131bc628622"><code>66c8a52</code></a>
Bump version: 7.0.0 → 7.1.0</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/f7076624784332594aa4cb3585d4757d295db15e"><code>f707662</code></a>
Make the examples use pypy 3.11.</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/6049a7847872e3139e6c82e93787123df5dc8672"><code>6049a78</code></a>
Make context test use the old ctracer (seems the new sysmon tracer
behaves di...</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/8ebf20bbbc73478b3f8fd36d30237d9ea083f06b"><code>8ebf20b</code></a>
Update changelog.</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/861d30e60d571f97259c6b718b71c819d5dbc3b9"><code>861d30e</code></a>
Remove the backup context manager - shouldn't be needed since coverage
5.0, ...</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/fd4c956014035527f0c3c8d7faef3f8cfdadac7f"><code>fd4c956</code></a>
Pass the precision on the nulled total (seems that there's some caching
goion...</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/78c9c4ecb005faf4962fd86ff7bf9c9cce9554d6"><code>78c9c4e</code></a>
Only run the 3.9 on older deps.</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/4849a922e8be725c662a3d9175da571ace6545dc"><code>4849a92</code></a>
Punctuation.</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/197c35e2f37031fd1927715307ab6eed7cb3d2b7"><code>197c35e</code></a>
Update changelog and hopefully I don't forget to publish release again
:))</li>
<li><a
href="https://github.com/pytest-dev/pytest-cov/commit/14dc1c92d44108384e39803888635fdbfc578b7f"><code>14dc1c9</code></a>
Update examples to use 3.11 and make the adhoc layout example look a bit
more...</li>
<li>Additional commits viewable in <a
href="https://github.com/pytest-dev/pytest-cov/compare/v7.0.0...v7.1.0">compare
view</a></li>
</ul>
</details>
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backend/pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
 dev = [
     {include-group = "lint"},
     "pytest==9.0.2",
-    "pytest-cov==7.0.0",
+    "pytest-cov==7.1.0",
     "assertpy==1.1",
     "testcontainers[cosmosdb]==4.14.2",
 ]