fix: skip already-aligned accounts during wallet alignment

[mathieuartu]

Explanation

References

Fixes: https://consensyssoftware.atlassian.net/browse/MUL-1939

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 core wallet alignment and account creation orchestration, but behavior is narrowed (less work, same end goal) and is covered by expanded alignment tests.

Overview
Wallet alignment no longer calls createAccounts for every provider across the full group index range. It now derives per-provider contiguous sub-ranges of missing (provider, group index) pairs and only invokes providers for those gaps; fully aligned providers are skipped entirely.

MultichainAccountGroup gains isProviderAligned(provider), and isAligned() delegates to it. Shared group-state building is refactored from #buildGroupStateForRange to #buildGroupState with a getSubRanges callback: creation still passes the full [from, to] range; alignment uses #getUnalignedSubRangesForProvider (missing groups count as unaligned). Tests cover partial gaps, skipping aligned providers, and non-contiguous missing indices; the changelog documents the fix.

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