chore: Bump yarn to 4.12.0 (#739)

Bumps `yarn` to version `4.12.0` (latest) in the hope of resolving some
Dependabot problems and also because we might as well.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Upgrades the workspace to Yarn 4.12.0.
> 
> - Updates `package.json` `packageManager` to `[email protected]`
> - Regenerates `yarn.lock` entries (resolution hashes and checksums for
TypeScript patch ranges)
> 
> No source code or dependency versions changed beyond lockfile
metadata.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
5beaab9. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: rekmarks

package.json

@@ -103,7 +103,7 @@
     "vitest": "^4.0.16",
     "vitest-fetch-mock": "^0.4.5"
   },
-  "packageManager": "yarn@4.2.2",
+  "packageManager": "yarn@4.12.0",
   "engines": {
     "node": "^20.11 || >=22"
   },

yarn.config.cjs

@@ -318,7 +318,7 @@ module.exports = defineConfig({
       if (isChildWorkspace) {
         workspace.unset('packageManager');
       } else {
-        expectWorkspaceField(workspace, 'packageManager', 'yarn@4.2.2');
+        expectWorkspaceField(workspace, 'packageManager', 'yarn@4.12.0');
       }
 
       // All packages must specify a minimum Node.js version of 20

yarn.lock

@@ -14771,41 +14771,41 @@ __metadata:
 
 "typescript@patch:typescript@npm%3A5.1.6 - 5.7.x#optional!builtin<compat/typescript>":
   version: 5.7.3
-  resolution: "typescript@patch:typescript@npm%3A5.7.3#optional!builtin<compat/typescript>::version=5.7.3&hash=b45daf"
+  resolution: "typescript@patch:typescript@npm%3A5.7.3#optional!builtin<compat/typescript>::version=5.7.3&hash=5786d5"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10/3ac7b7e3e899273d2fbdce6e24b93d4d53a705ad7a7e4cc83b4c57bcb6d25948abcd2a21994f6b9c73ab03960f395aae95f0458de292a66ce0134233261714c3
+  checksum: 10/dc58d777eb4c01973f7fbf1fd808aad49a0efdf545528dab9b07d94fdcb65b8751742804c3057e9619a4627f2d9cc85547fdd49d9f4326992ad0181b49e61d81
   languageName: node
   linkType: hard
 
 "typescript@patch:typescript@npm%3A5.6.1-rc#optional!builtin<compat/typescript>":
   version: 5.6.1-rc
-  resolution: "typescript@patch:typescript@npm%3A5.6.1-rc#optional!builtin<compat/typescript>::version=5.6.1-rc&hash=b45daf"
+  resolution: "typescript@patch:typescript@npm%3A5.6.1-rc#optional!builtin<compat/typescript>::version=5.6.1-rc&hash=8c6c40"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10/03b52131d656ea802ac2cc43209bf82e45db05d21618f149847f7693e86cb158d3140832b7d4ec32952b64a7048974e12e255f7c3ed31598a9b9d0b4ce0551d4
+  checksum: 10/462e0bb46c63abfc5bfc43f2bb00b9777a4228f3ed52d8930b46404dce71dbada63c27a99262ff4570b5ff7d01455701bfd36823bd3c766e443b6fa33cd31dea
   languageName: node
   linkType: hard
 
 "typescript@patch:typescript@npm%3A5.8.2#optional!builtin<compat/typescript>":
   version: 5.8.2
-  resolution: "typescript@patch:typescript@npm%3A5.8.2#optional!builtin<compat/typescript>::version=5.8.2&hash=b45daf"
+  resolution: "typescript@patch:typescript@npm%3A5.8.2#optional!builtin<compat/typescript>::version=5.8.2&hash=5786d5"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10/6ae9b2c4d3254ec2eaee6f26ed997e19c02177a212422993209f81e87092b2bb0a4738085549c5b0164982a5609364c047c72aeb281f6c8d802cd0d1c6f0d353
+  checksum: 10/97920a082ffc57583b1cb6bc4faa502acc156358e03f54c7fc7fdf0b61c439a717f4c9070c449ee9ee683d4cfc3bb203127c2b9794b2950f66d9d307a4ff262c
   languageName: node
   linkType: hard
 
 "typescript@patch:typescript@npm%3A~5.8.2#optional!builtin<compat/typescript>":
   version: 5.8.3
-  resolution: "typescript@patch:typescript@npm%3A5.8.3#optional!builtin<compat/typescript>::version=5.8.3&hash=b45daf"
+  resolution: "typescript@patch:typescript@npm%3A5.8.3#optional!builtin<compat/typescript>::version=5.8.3&hash=5786d5"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 10/98470634034ec37fd9ea61cc82dcf9a27950d0117a4646146b767d085a2ec14b137aae9642a83d1c62732d7fdcdac19bb6288b0bb468a72f7a06ae4e1d2c72c9
+  checksum: 10/b9b1e73dabac5dc730c041325dbd9c99467c1b0d239f1b74ec3b90d831384af3e2ba973946232df670519147eb51a2c20f6f96163cea2b359f03de1e2091cc4f
   languageName: node
   linkType: hard