cleanup(data)!: remove the run_query.py script (#126)

We used to use this script to generate data but now we don't need this
anymore and we can get rid of it.

BREAKING CHANGE: remove ./data/run_query.py script.

Author: bassosimone

data/README.md

@@ -9,8 +9,6 @@ and local cache artifacts produced during generation.
   under `./cache/v1/` for local use.
 - `pipeline.yaml`: Matrix configuration (dates and granularities) used by the
   data generation script.
-- `run_query.py`: Legacy single-query helper (kept for now, but not the
-  preferred workflow).
 - `ghcache.py`: Helper for publishing cache files to GitHub releases.
 - `state/ghremote/manifest.json`: Release manifest used by the GitHub remote
   cache implementation.

data/run_query.py

@@ -77,7 +77,7 @@ def __init__(
         # Alternative quick implementation:
         #   - Use environment variable: IQB_SAMPLE_PERCENT (default: 100)
         #   - No code changes to queries
-        #   - Usage: IQB_SAMPLE_PERCENT=25 python run_query.py ...
+        #   - Example: IQB_SAMPLE_PERCENT=25 uv run python data/generate_data.py ...
         #
         # Decision: Not implementing now (YAGNI - add when actually needed)