feat: updated character length to 3 for ENS controller

[NidhiKJha]

Explanation

This PR is to update ens character length from 7 in regex to 3

Fixes: issue

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Changes input validation for ENS names, which can affect what names are accepted/stored across controllers; logic change is small but broadens allowed inputs and could surface edge-case name handling differences.

Overview
ENS name validation is loosened by updating normalizeEnsName to accept .eth/.test names where the final label is 3+ characters (previously 7+), enabling shorter ENS registrations to be stored and resolved.

Tests are updated to reflect the new minimum length, including coverage that EnsController.set now accepts foo.eth and that multi-level names like foo.barbaz.eth are no longer rejected purely for length; the controller-utils changelog is updated accordingly.

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