added Data durability section to InfluxDb 3 Internals home page

content/influxdb3/core/reference/influxDB3 internals /_index.md

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-title: InfluxDB3 data durability
+title: InfluxDB 3 Internals
 description: >
-  Learn about InfluxDB3 internal systems and mechanisms.
+  Learn about InfluxDB 3 internal systems and mechanisms.
 menu:
   influxdb3_core:
     name: InfluxDB3 internals
     parent: Reference
-weight: 104
+weight: 107
 source: /shared/influxdb3-internals-reference/_index.md
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+{{< children >}}
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content/shared/influxdb3-internals-reference/_index.md

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-Hi
+### Data durability 
+InfluxDB 3 ensures data durability through a structured write path that balances performance, persistence, and query efficiency. Data moves through validation, in-memory buffering, Write-Ahead Log (WAL) persistence, and long-term storage in Parquet format to provide reliability and optimized access.