feat(dev): added m2m events ttl cleaner cronjob (PIN-8266)

[Carminepo2]

Issue

• PIN-8266

Contesto / Perché

This PR adds anew cronjob m2m-events-ttl-cleaner with a psql script that removes old records from M2M event tables based on a configurable TTL (Time To Live) retention policy.

It automatically finds tables with event_timestamp column, skipping the ones who don't.
Added new ${NAMESPACE}_m2m_event_ttl_cleaner_user user with DELETE grant for all m2m events tables.

PSQL script tested locally.

Servizi / Scope impattati

• dev

Checklist Tracciabilità

• Branch contiene la Jira key
• Titolo PR conforme (type(scope): descrizione (KEY))
• Fix Version impostata in Jira
• Label servizio applicate

[galales]

my suggestion on using directly the postgres image was based on the assumption that the command would have been much easier (basically just the delete).

I appreciate your implementation, with consistent logging and almost zero maintenance for new tables (just be careful because the presence of a column is not a strong discriminator).
On the other side, bash syntax is quite difficult to maintain when parsed as string, and errors in the script may be found only at runtime.
If you prefer having this logic I suggest considering writing a node application instead.

[Carminepo2]

Closed in favor of #439