refactor: rename the application package to docsgpt

The backend import package is now docsgpt, the name it will carry on PyPI;
application was far too generic to install into anyone's site-packages.
git mv plus a mechanical rewrite of every import, dotted string and path
reference: 734 Python files, the compose files, Dockerfile, workflows, docs,
setup scripts, devcontainer, k8s manifests, vscode config, pytest and coverage
config, .gitignore. Behaviour is unchanged.

Kept for one release:
- A top-level application package whose meta-path finder resolves
  application.x.y to the already-imported docsgpt.x.y object, so old imports
  and entry points (celery -A application.app.celery,
  uvicorn application.asgi:asgi_app) keep working with a FutureWarning.
- Celery registers every application.* task name as an alias of its
  docsgpt.* task on start-up, so messages queued by the previous release still
  run. The redbeat key prefix moves to redbeat:docsgpt:v2: so schedule entries
  the previous release wrote are left unread instead of firing twice.

The backend image builds from the repository root (docker build -f
docsgpt/Dockerfile .) so it can ship the alias package; a root .dockerignore
allow-lists docsgpt/ and application/ and keeps caches, local data, .env
files, the sample index files and the Dockerfile out. Compose and the image
workflows point at the new context.

.github/workflows/backend-release.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches: [main]
     paths:
-      - 'application/version.py'
+      - 'docsgpt/version.py'
   workflow_dispatch:
 
 permissions:
@@ -23,12 +23,12 @@ jobs:
         with:
           persist-credentials: false
 
-      - name: Read version from application/version.py
+      - name: Read version from docsgpt/version.py
         id: ver
         run: |
-          VERSION=$(python3 -c "g={}; exec(open('application/version.py').read(), g); print(g['__version__'])")
+          VERSION=$(python3 -c "g={}; exec(open('docsgpt/version.py').read(), g); print(g['__version__'])")
           if [ -z "$VERSION" ]; then
-            echo "::error::Could not read __version__ from application/version.py"
+            echo "::error::Could not read __version__ from docsgpt/version.py"
             exit 1
           fi
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"

.github/workflows/bandit.yaml

@@ -28,13 +28,13 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install bandit  # Bandit is needed for this action
-          if [ -f application/requirements.txt ]; then pip install -r application/requirements.txt; fi
+          if [ -f docsgpt/requirements.txt ]; then pip install -r docsgpt/requirements.txt; fi
 
       - name: Run Bandit scan
         uses: PyCQA/bandit-action@v1
         with:
           severity: medium
           confidence: medium
-          targets: application/
+          targets: docsgpt/
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/ci.yml

@@ -63,9 +63,9 @@ jobs:
       - name: Build and push platform-specific images
         uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with:
-          file: './application/Dockerfile'
+          file: './docsgpt/Dockerfile'
           platforms: ${{ matrix.platform }}
-          context: ./application
+          context: .
           push: true
           build-args: |
             EXTRAS=${{ matrix.variant == '-docling' && 'docling' || '' }}

.github/workflows/docker-develop-build.yml

@@ -65,9 +65,9 @@ jobs:
       - name: Build and push platform-specific images
         uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with:
-          file: './application/Dockerfile'
+          file: './docsgpt/Dockerfile'
           platforms: ${{ matrix.platform }}
-          context: ./application
+          context: .
           push: true
           build-args: |
             EXTRAS=${{ matrix.variant == '-docling' && 'docling' || '' }}

.github/workflows/docker-image-verify.yml

@@ -8,14 +8,15 @@ on:
   workflow_dispatch:
   pull_request:
     paths:
-      - 'application/Dockerfile'
-      - 'application/.dockerignore'
+      - 'docsgpt/Dockerfile'
+      - '.dockerignore'
+      - 'application/**'
       - 'application/requirements*.txt'
-      - 'application/scripts/prefetch_models.py'
-      - 'application/scripts/verify_offline.py'
-      - 'application/vectorstore/model_registry.py'
-      - 'application/parser/tokenization.py'
-      - 'application/vectorstore/embeddings_local.py'
+      - 'docsgpt/scripts/prefetch_models.py'
+      - 'docsgpt/scripts/verify_offline.py'
+      - 'docsgpt/vectorstore/model_registry.py'
+      - 'docsgpt/parser/tokenization.py'
+      - 'docsgpt/vectorstore/embeddings_local.py'
       - '.github/workflows/docker-image-verify.yml'
 
 permissions:
@@ -40,8 +41,8 @@ jobs:
       - name: Build the image
         uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with:
-          file: ./application/Dockerfile
-          context: ./application
+          file: ./docsgpt/Dockerfile
+          context: .
           platforms: linux/amd64
           load: true
           tags: docsgpt:verify${{ matrix.variant }}
@@ -63,4 +64,4 @@ jobs:
           IMAGE: docsgpt:verify${{ matrix.variant }}
         run: |
           docker run --rm --network none "$IMAGE" \
-            python -m application.scripts.verify_offline
+            python -m docsgpt.scripts.verify_offline

.github/workflows/lint.yml

@@ -36,4 +36,4 @@ jobs:
         run: |
           uv lock --check
           bash scripts/export_requirements.sh
-          git diff --exit-code -- application/requirements.txt application/requirements-docling.txt application/requirements-milvus.txt
+          git diff --exit-code -- docsgpt/requirements.txt docsgpt/requirements-docling.txt docsgpt/requirements-milvus.txt

.github/workflows/pytest.yml

@@ -26,7 +26,7 @@ jobs:
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
       - name: Test with pytest and generate coverage report
         run: |
-          python -m pytest -n auto --cov=application --cov-report=xml --cov-report=term-missing
+          python -m pytest -n auto --cov=docsgpt --cov-report=xml --cov-report=term-missing
       - name: Upload coverage reports to Codecov
         if: github.event_name == 'pull_request' && matrix.python-version == '3.12'
         uses: codecov/codecov-action@v5