docs: update README and gitignore

Author: wietzesuijker

.gitignore

@@ -62,3 +62,5 @@ Thumbs.db
 *.zarr
 out/
 reports/
+*.pyc
+pipeline_utils.py

README.md

@@ -208,6 +208,7 @@ Tests are planned for `tests/` directory (structure exists, test files to be add
 - S3: `s3.de.io.cloud.ovh.net` / `esa-zarr-sentinel-explorer-fra`
 - Staging collection: `sentinel-2-l2a-dp-test`
 - Production collection: `sentinel-2-l2a`
+- **Enable debug logs:** `export LOG_LEVEL=DEBUG` (or add to workflow env)
 
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