Add statistical analytics to the records module

[philippgualdi]

This pull request introduces a statistical feature from invenio-stats for this data model. This includes the aggregation of events and display of views and download for publication records. The implementation enhances the module by providing deeper insights into user interactions and system performance relating to specific records.

Key Changes:

1. Record Mapping Adjustments:

   • Modified the record mapping to include statistic fields stored in the record.

2. Statistics Template:

   • Added a new Jinja2 template for statistical event visualizations. This template is designed to display aggregated data and is integrated within the existing module UI.

3. Aggregation Functionality:

   • Integrated ìnvenio-stats` backend functionality to query aggregated events data for a record.

4. OpenSearch Template for MARC21 Records:

   • Integrated OpenSearch templates, indexing the events and aggregations for a marc21 record.

5. Enhanced Configuration Flexibility:

   • Configuration blueprints can now be dynamically loaded, which permits instance-specific configurations without altering the core module code.

Testing:

Add to invenio.cfg following lines:

from invenio_records_marc21.config import MARC21_STATS_CELERY_TASKS, MARC21_STATS_EVENTS, MARC21_STATS_AGGREGATIONS, MARC21_STATS_QUERIES
from invenio_app_rdm.config import CELERY_BEAT_SCHEDULE, STATS_EVENTS, STATS_AGGREGATIONS, STATS_QUERIES

CELERY_BEAT_SCHEDULE.update(MARC21_STATS_CELERY_TASKS)
STATS_EVENTS.update(MARC21_STATS_EVENTS)
STATS_AGGREGATIONS.update(MARC21_STATS_AGGREGATIONS)
STATS_QUERIES.update(MARC21_STATS_QUERIES)