Replace application prints and bare excepts with logging

[jrhoads]

Purpose

Send application trace output through the logging system, and stop bare except clauses from swallowing SystemExit and KeyboardInterrupt.

Approach

Replace print() in application modules with logging.getLogger(__name__). Leave test progress output as print(). Replace the bare except: clauses in getrordump.py and create_update.py with except Exception. Add a console handler for the rorapi logger at INFO so those messages still show up the way the prints did.

Key Modifications

• Log former print() calls in views, CSV create/update/bulk helpers, record validation, setup, and record create/update.
• Log the missing DATA_STORE notice with logger.warning.
• Catch Exception instead of a bare except when reading a GitHub dump response, saving the dump zip, and looking up a Geonames id.
• Configure the rorapi logger to write INFO messages to the console.

Important Technical Details

• except Exception does not catch SystemExit. The dump zip check that raises SystemExit when the archive contains an extra directory now reaches the caller instead of being replaced with "Something went wrong saving zip file".
• Test files still use print() for progress and score output.
• A commented-out print in es_utils.py is unchanged.
• Default Django logging does not show INFO logs from app loggers. The new LOGGING entry does, without changing the django logger.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Test plan

• CI tests_unit on this PR

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