.github: Add github CI files

Author: AlexisMontagne

.github/CODEOWNERS

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+* @AlexisMontagne @upfluence/golang

.github/pull_request_template.md

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+### What does this PR do?
+
+<!-- A brief description of the context of this pull request and its purpose. -->
+
+Fixes #<!-- enter issue number here -->
+
+### What are the observable changes?
+<!-- This question could be adequate with multiple use cases, for example: -->
+
+<!-- Frontend: explain the feature created / updated, give instructions telling how to see the change in staging -->
+<!-- Performance: what metric should be impacted, link to the right graphana dashboard for exemple -->
+<!-- Bug: a given issue trail on sentry should stop happening -->
+<!-- Feature: Implements X thrift service / Z HTTP REST API added, provide instructions on how leverage your feature from staging or your workstation -->
+
+### Good PR checklist
+
+- [ ] Title makes sense
+- [ ] Is against the correct branch
+- [ ] Only addresses one issue
+- [ ] Properly assigned
+- [ ] Added/updated tests
+- [ ] Added/updated documentation
+- [ ] Properly labeled
+
+### Additional Notes
+
+<!--
+    You can add anything you want here, an explanation on the way you built your implementation,
+    precisions on the origin of the bug, gotchas you need to mention.
+ -->

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+
+jobs:
+  test:
+    name: Run Tests
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        go: [ '1.22.x', '1.21.x', '1.20.x' ]
+    services:
+      redis:
+        image: redis
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 6379:6379
+
+    steps:
+      - name: Install Go ${{ matrix.go }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go }}
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Cache Modules
+        uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-v1-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Run tests
+        run: go test -p 1 -v ./...
+        env:
+          POSTGRES_URL: redis://localhost:6379/0

.github/workflows/lint.yml

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+name: reviewdog
+on: [pull_request]
+
+jobs:
+  lint:
+    name: runner / golangci-lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.22.x
+      - name: Check out code
+        uses: actions/checkout@v1
+      - name: golanci-lint
+        uses: upfluence/action-golangci-lint@master
+        with:
+          github_token: ${{ secrets.github_token }}