<p dir="auto">This seems to be the only table that doesn't actually have a primary key defined in the database for some reason, instead we just lie to rails about it's existence.</p>
<p dir="auto">It also improves our monkey patched primary key support for migrations to allow concurrent builds of primary keys and fix removal of primary keys which it seems has never worked.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/openstreetmap/openstreetmap-website/pull/4279'>https://github.com/openstreetmap/openstreetmap-website/pull/4279</a></p>

<h4>Commit Summary</h4>
<ul>
  <li><a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/commits/132bb9ad598c8a91b25f9a5010b21d25f1cffff9" class="commit-link">132bb9a</a>  Improve support for primary keys in migrations</li>
  <li><a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/commits/387ecce798585022ffac69d28ae703c737c36f3b" class="commit-link">387ecce</a>  Add a primary key to the changeset_tags table</li>
</ul>

<h4 style="display: inline-block">File Changes </h4> <p style="display: inline-block">(<a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/files">3 files</a>)</p>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/files#diff-0a387e55d510dce7686761db80135118e68a1ec66c125e3217a2871055fd8b36">config/initializers/migrate.rb</a>
    (42)
  </li>
  <li>
    <strong>A</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/files#diff-c3fb8065644bfa6e6fc056b3f6d1780d09698e80abd719f51ac325cfe6d8f117">db/migrate/20231007141103_add_primary_key_to_changeset_tags.rb</a>
    (13)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/4279/files#diff-1dd5a8f580b9615769ddc19a64a98f455d9d20eb149c443f41d9d3c797d39b12">db/structure.sql</a>
    (16)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/4279.patch'>https://github.com/openstreetmap/openstreetmap-website/pull/4279.patch</a></li>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/4279.diff'>https://github.com/openstreetmap/openstreetmap-website/pull/4279.diff</a></li>
</ul>

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