feat: Add workflow and craft tooling for client libs

.github/workflows/build-client.yml

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+name: Build Python client
+
+on:
+  push:
+    branches:
+      - release/**
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build and upload artifacts
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+
+      - name: Build artifacts
+        run: uv build --package taskbroker-client
+
+      - uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: ${{ github.sha }}
+          path: dist/*
+          if-no-files-found: 'error'

.github/workflows/release-client.yml

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+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Version to release
+        required: true
+      force:
+        description: Force a release even when there are release-blockers (optional)
+        required: false
+      merge_target:
+        description: Target branch to merge into. Uses the default branch as a fallback (optional)
+        required: false
+
+permissions:
+  contents: read
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get auth token
+        id: token
+        uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e # v2.0.6
+        with:
+          app-id: ${{ vars.SENTRY_RELEASE_BOT_CLIENT_ID }}
+          private-key: ${{ secrets.SENTRY_RELEASE_BOT_PRIVATE_KEY }}
+
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ steps.token.outputs.token }}
+          fetch-depth: 0
+
+      - name: Prepare release
+        uses: getsentry/craft@c6e2f04939b6ee67030588afbb5af76b127d8203 # v2
+        env:
+          GITHUB_TOKEN: ${{ steps.token.outputs.token }}
+        with:
+          version: ${{ github.event.inputs.version }}
+          force: ${{ github.event.inputs.force }}
+          path: clients

clients/.craft.yml

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+changelogPolicy: auto
+preReleaseCommand: ../scripts/bump-version-clients.sh
+
+targets:
+  - name: github
+  - name: pypi
+  - name: sentry-pypi
+    internalPypiRepo: getsentry/pypi
+
+requireNames:
+  - /.*taskbroker_client.*whl$/
+  - /.*taskbroker_client.*tar\.gz$/

clients/CHANGELOG.md

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+# Changelog

scripts/bump-version-clients.sh

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+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+ROOT_DIR=$(dirname $SCRIPT_DIR)
+
+cd $ROOT_DIR/clients/python
+
+uv version "${NEW_VERSION}"