fix(db): retain tag info with cleanup

[XOlegator]

Summary

Keep ipm_tag_info under the same retention policy as the other aggregated tables and add an index on created_at for efficient cleanup.

Why

ipm_tag_info is populated on every aggregation run and is queried with a created_at window in the UI, but it was not included in the retention cleanup list. That means the table would keep growing past the configured APP_RECORDS_LIFETIME even though the rest of the aggregate tables are pruned.

Change

• add ipm_tag_info to the aggregation cleanup list
• add a migration that creates iti_c on ipm_tag_info(created_at) so cleanup does not scan the whole table

Validation

• php -l src/Command/AggregateCommand.php
• php -l migrations/Version20260530160000.php
• vendor/bin/phpstan analyse --no-progress src/Command/AggregateCommand.php migrations/Version20260530160000.php
• vendor/bin/phpunit --no-progress

Local data check

• ipm_tag_info exists in the local pinba database and is populated by the current aggregator
• the table already has rows older than 14 days, so retention is relevant under the configured P1M lifetime