DOC-6520 added note about MariaDB binlog config

[andy-stark-redis]

Requested from a Slack thread. Note that both the Cloud docs and the on-prem docs refer to this same page for source DB configuration.

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Note

Low Risk
Low risk documentation-only change; main risk is potential user misconfiguration if the new MariaDB settings are inaccurate for certain versions.

Overview
Clarifies MariaDB source DB setup for RDI by adding required binlog configuration guidance: disable binary log compression via log_bin_compress=0 and (for MariaDB 11.4+) set binlog_legacy_event_pos=1 to avoid collector crash loops after server restarts.

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[github-actions]

DOC-6520

[github-actions]

Staging links:
https://redis.io/docs/staging/DOC-6520-rdi-maria-config/integrate/redis-data-integration/data-pipelines/prepare-dbs/my-sql-mariadb/

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[dwdougherty]

Language LGTM.