Fix/treat pytest exit 5 (no tests collected) as success

The release pipeline runs `make test MARKER="integration"` across
non-video paths. There are no `@pytest.mark.integration` tests in those
paths, so pytest deselects all 579 collected items and exits with code
5 ("no tests collected"). make treats that as a failure, so every
"Test (integration) / Non-video tests (3.x)" matrix cell reports
failure and the `release` job's `needs:` cannot be satisfied. Example:
https://github.com/GetStream/stream-py/actions/runs/26416959683.

Wrap the `test` and `test-video` recipes so exit code 5 is converted
to 0 (with a log line) while every other non-zero code still
propagates. The fix is symmetric across both recipes because either
group may have an empty marker selection in the future.

Author: aliev

Makefile

@@ -56,11 +56,13 @@ TY_EXCLUDES := \
 
 ## Run non-video tests (chat, feeds, moderation, etc.)
 test:
-	uv run pytest -m "$(MARKER)" tests/ getstream/ $(VIDEO_IGNORE) $(MANUAL_IGNORE)
+	@uv run pytest -m "$(MARKER)" tests/ getstream/ $(VIDEO_IGNORE) $(MANUAL_IGNORE); \
+	ec=$$?; if [ $$ec -eq 5 ]; then echo "No tests matched marker '$(MARKER)' — treating as success."; exit 0; else exit $$ec; fi
 
 ## Run video/WebRTC tests only
 test-video:
-	uv run pytest -m "$(MARKER)" $(VIDEO_PATHS)
+	@uv run pytest -m "$(MARKER)" $(VIDEO_PATHS); \
+	ec=$$?; if [ $$ec -eq 5 ]; then echo "No tests matched marker '$(MARKER)' — treating as success."; exit 0; else exit $$ec; fi
 
 ## Run all tests (non-video + video), excluding manual tests
 test-all: