chore(deps): bump @ar.io/sdk to 4.0.0-solana.26 (exact, parity)

[vilenarios]

Parity/currency bump alongside ar-io-observer#93 (the observer's actual fix).

Context

The observer was blind on Solana staging because @ar.io/sdk@solana.24 bundled the pre-ADR-024 devnet-shrunk contracts client, whose Epoch decoder used failure_counts: [u16; 30] instead of the deployed [u16; 3000] → every following field shifted → prescribed_observers/names decoded as zeros.

ar-io-node is NOT affected by that bug — it uses @ar.io/sdk only for ArNS resolution (arns-names-cache, composite/on-demand-arns-resolver); it never decodes Epoch/prescribed names.

Why bump anyway

• Aligns onto the same full-size client (@ar.io/solana-contracts@0.5.0-staging.15) the rest of the stack now uses.
• Replaces the loose caret (^4.0.0-solana.22) with an exact pin — caret drift is exactly what stranded the observer on a stale build.
• Picks up SDK fixes since .22.

Notes / caveats

• .22 → .26 touches ArNS-resolution behavior — please let CI run the resolver suite before merge.
• yarn.lock refreshed with classic yarn 1.22.22 (stays lockfile v1, not berry).
• Local install hit an unrelated better-sqlite3 node-gyp error under node 24 (native build/env), not a lockfile issue — resolution succeeded and @ar.io/sdk@4.0.0-solana.26 is pinned. CI/Docker builds it in a proper toolchain.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: c46921c9-c637-40d1-aaeb-5fbf2cf47d24

📥 Commits

Reviewing files that changed from the base of the PR and between 8203036 and 162c48f.

⛔ Files ignored due to path filters (1)

• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (1)

• package.json

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📝 Walkthrough

Walkthrough

Updates the @ar.io/sdk dependency version from ^4.0.0-solana.22 to 4.0.0-solana.26 in package.json, removing the caret constraint and pinning to a fixed version.

Changes

Dependency Updates

Layer / File(s)	Summary
Update @ar.io/sdk dependency version package.json	The @ar.io/sdk dependency is updated from ^4.0.0-solana.22 to 4.0.0-solana.26, pinning to an exact version instead of allowing compatible patch releases.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• ar-io/ar-io-node#280: Bumps the @ar.io/sdk dependency version in the same file.
• ar-io/ar-io-node#761: Updates @ar.io/sdk dependency to a Solana variant version in package.json.
• ar-io/ar-io-node#294: Changes the @ar.io/sdk dependency version with a different pre-release variant.

Suggested reviewers

• djwhitt
• karlprieb

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: bumping @ar.io/sdk dependency version and changing from a caret to an exact pin.
Description check	✅ Passed	The description is directly related to the changeset, providing context about why the dependency bump was necessary and its implications for ArNS resolution.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/bump-sdk-develop

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.43%. Comparing base (8203036) to head (162c48f).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #763      +/-   ##
===========================================
+ Coverage    79.41%   79.43%   +0.01%     
===========================================
  Files          125      125              
  Lines        46457    46457              
  Branches      3560     3560              
===========================================
+ Hits         36896    36903       +7     
+ Misses        9514     9507       -7     
  Partials        47       47              

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