docs: require Redis 6.2 for atomic runtime store take

[jeremi]

The README currently permits Redis 6.0, but the runtime store's Take operation calls GETDEL, introduced in Redis 6.2.0. Update both minimum-version references and explain the atomic retrieval/deletion requirement with a link to the Redis command documentation.

Validation: checked the runtime implementation and official command contract; git diff --check passes. Documentation-only change, so runtime tests were not run.

Summary by CodeRabbit

• Documentation
  • Updated Redis prerequisites to require version 6.2 or later.
  • Documented the required GETDEL command support.
  • Updated the Postman FAPI2 setup prerequisites accordingly.

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• esignet-service/README.md

Walkthrough

The README now requires Redis 6.2+ and documents the runtime requirement for the atomic GETDEL command. The Postman FAPI2 prerequisite uses the same Redis version.

Changes

Redis prerequisite documentation

Layer / File(s)	Summary
Document Redis 6.2 requirement esignet-service/README.md	The runtime and Postman FAPI2 prerequisites now specify Redis 6.2+. The README documents the atomic GETDEL requirement.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: 🔵 Low · up to 96dcc

The README correctly raises the Redis version for Redis-backed runtime storage, but the FAPI2 instructions may unnecessarily require Redis for configurations that use in-memory storage. Clarify that Redis 6.2+ is required when the Redis runtime store is selected.

Suggested reviewers: anushasunkada, nandhu-kumar, sacrana0

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main documentation change: requiring Redis 6.2 for the atomic runtime store operation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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_{Redis six-two stands ready
GETDEL keeps the store steady
README marks the way
FAPI2 follows today
Clear prerequisites guide the day}

_{Comment @coderabbitai help to get the list of available commands.}

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Actionable comments posted: 1

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Inline comments:
In `@esignet-service/README.md`:
- Line 466: Update the README prerequisite statement to make Redis 6.2+
conditional on selecting the Redis runtime store, such as via
MOSIP_ESIGNET_CACHE_TYPE=redis; clarify that the in-memory store configuration
does not require Redis while preserving the other folder requirements and
collection README reference.

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• esignet-service/README.md

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