docs: updated info on pg and redis with Infisical self hosting

[akhilmhdh]

Context

Added dedicated documentation pages for Postgres and Redis covering what each component stores, supported deployment modes, environment variable configuration, data loss implications, and operational recommendations.

Screenshots

Steps to verify the change

Type

• Fix
• Feature
• Improvement
• Breaking
• Docs
• Chore

Checklist

• Title follows the conventional commit format: type(scope): short description (scope is optional, e.g., fix: prevent crash on sync or fix(api): handle null response).
• Tested locally
• Updated docs (if needed)
• Updated CLAUDE.md files (if needed)
• Read the contributing guide

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Project	Status	Preview	Updated (UTC)
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[maidul98]

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[greptile-apps]

Greptile Summary

This PR adds dedicated documentation pages for PostgreSQL and Redis in the Infisical self-hosting guides, covering what each component stores, supported deployment modes, environment variable configuration, data loss implications, and operational recommendations. It also updates the overview page with an Architecture Overview section and corrects an outdated claim in requirements.mdx that Redis Cluster mode was unsupported.

• New self-hosting/guides/postgresql.mdx: comprehensive reference for PostgreSQL's role, supported modes (Standalone + Read Replicas), env var config with SSL/AWS RDS examples, and backup/HA recommendations.
• New self-hosting/guides/redis.mdx: covers Standalone, Sentinel, Cluster, and Read Replica modes with full env var config, SSL/TLS guidance, data loss impact, and persistence requirements. Contains a broken image syntax (![here]) that will render as a broken image instead of a hyperlink.
• requirements.mdx: correctly updates Redis Cluster from "not supported" to "supported" and upgrades the active-passive guidance to a Warning about unsupported active-active geo-replication.
• overview.mdx + docs.json: wires the new pages into navigation and adds an Architecture Overview section.

Confidence Score: 4/5

Safe to merge after fixing the broken image link in redis.mdx — the content is accurate and well-structured.

One P1 syntax issue: ![here](url) on line 83 of redis.mdx will render as a broken image in the published docs rather than a hyperlink. This is a real rendering defect visible to all readers of that page. The remaining finding is a P2 Mintlify header hierarchy suggestion. No code changes are involved.

docs/self-hosting/guides/redis.mdx — line 83 broken image syntax needs correction before the page renders correctly.

Important Files Changed

Filename	Overview
docs/self-hosting/guides/redis.mdx	New Redis documentation page covering what it stores, supported modes, configuration (Standalone/Sentinel/Cluster/Read Replica), impact of data loss, and operational recommendations. Contains a broken image link syntax (![here] instead of [here]) on line 83 and a minor header hierarchy issue.
docs/self-hosting/guides/postgresql.mdx	New PostgreSQL documentation page covering what it stores, supported modes (Standalone + Read Replicas), configuration env vars with AWS RDS accordion example, data loss implications, and recommendations. Well-structured with no notable issues.
docs/self-hosting/configuration/requirements.mdx	Updates Redis section: upgrades the active-passive recommendation to a Warning about unsupported active-active geo-replication, and corrects the supported modes list to include Cluster (previously incorrectly stated as unsupported).
docs/self-hosting/overview.mdx	Adds an "Architecture Overview" section linking to the new PostgreSQL and Redis guide pages, and fixes a sentence fragment in the Flexibility bullet.
docs/docs.json	Registers the two new guide pages (postgresql and redis) in the navigation under "Self-host Infisical", before the existing "Installation methods" group.

_{Reviews (1): Last reviewed commit: "docs: updated infra info to have configu..." | Re-trigger Greptile}