ci: add pytest.ini, prevent sdist artifact commits, fix CI trigger

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jshotwell

.github/workflows/sdk-tests.yml

@@ -7,13 +7,15 @@ on:
       - "sdk/**"
       - "tests/**"
       - "pyproject.toml"
+      - "pytest.ini"
       - ".github/workflows/sdk-tests.yml"
   pull_request:
     branches: [main]
     paths:
       - "sdk/**"
       - "tests/**"
       - "pyproject.toml"
+      - "pytest.ini"
 
 permissions:
   contents: read

.gitignore

@@ -35,6 +35,9 @@ build/
 .pytest_cache/
 pytest-cache-files-*/
 
+# Build sdist extraction artifacts (never commit these)
+air_blackbox-*/
+
 # Model files (too large for git)
 model/*.gguf
 

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+testpaths = tests