Postgres Environment Fingerprint With Stmtcache Probe

Identifies a PostgreSQL reconnaissance sequence where an actor first issues a comment-based parser probe, then interacts using a deterministic statement-cache prepared statement identifier, followed by enumeration of the current database encoding and locale settings via pg_catalog.pg_database. This pattern reflects automated client or adversarial tooling performing environment fingerprinting to assess query parsing behavior, driver compatibility, and database configuration prior to further interaction or exploitation attempts.