Speed up ci by only running fast tests on drafts

.github/workflows/docs.yaml

@@ -7,10 +7,14 @@ on:
       - 'docs/**'
       - 'mkdocs.yml'
       - 'flixopt/**'
+      - '.github/workflows/**'
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     paths:
       - 'docs/**'
       - 'mkdocs.yml'
+      - 'flixopt/**'
+      - '.github/workflows/**'
   workflow_dispatch:
   workflow_call:
     inputs:
@@ -81,6 +85,14 @@ jobs:
             grep -vFf slow_notebooks.txt | \
             xargs -P 4 -I {} sh -c 'jupyter execute --inplace "$1" || exit 255' _ {}
 
+      - name: Execute slow notebooks
+        if: steps.notebook-cache.outputs.cache-hit != 'true' && github.event.pull_request.draft != 'true'
+        run: |
+          set -eo pipefail
+          # Execute slow notebooks in parallel (skip on draft PRs)
+          cd docs/notebooks && cat slow_notebooks.txt | \
+            xargs -P 4 -I {} sh -c 'jupyter execute --inplace "$1" || exit 255' _ {}
+
       - name: Build docs
         env:
           MKDOCS_JUPYTER_EXECUTE: "false"

.github/workflows/tests.yaml

@@ -3,8 +3,19 @@ name: Tests
 on:
   push:
     branches: [main]
+    paths:
+      - 'flixopt/**'
+      - 'tests/**'
+      - 'pyproject.toml'
+      - '.github/workflows/**'
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     branches: ["**"]
+    paths:
+      - 'flixopt/**'
+      - 'tests/**'
+      - 'pyproject.toml'
+      - '.github/workflows/**'
   workflow_dispatch:
   workflow_call:  # Allow release.yaml to call this workflow.
 
@@ -62,7 +73,14 @@ jobs:
         run: uv pip install --system .[dev]
 
       - name: Run tests
-        run: pytest -v --numprocesses=auto
+        run: |
+          if [[ "${{ github.event.pull_request.draft }}" == "true" ]]; then
+            # Draft PR: skip examples, slow, and deprecated_api
+            pytest -v --numprocesses=auto -m "not examples and not slow and not deprecated_api"
+          else
+            # Ready PR & main push: examples excluded via addopts
+            pytest -v --numprocesses=auto
+          fi
 
   test-examples:
     runs-on: ubuntu-24.04