[Vault] default to engine-cloud vault proxy

[d4mr]

PR-Codex overview

This PR introduces enhancements to the createVaultClient function in the vault-sdk package by adding support for an optional secretKey and updating the default baseUrl. It also modifies the request headers to include the secretKey when provided.

Detailed summary

• Updated createVaultClient function to accept an optional secretKey.
• Set default baseUrl to "https://engine.thirdweb.com" if not provided.
• Constructed headers to include x-secret-key if secretKey is supplied.
• Simplified the headers assignment in the fetch request.

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[changeset-bot]

🦋 Changeset detected

Latest commit: da8dff0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@thirdweb-dev/vault-sdk	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.50%. Comparing base (0eff648) to head (da8dff0).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7058   +/-   ##
=======================================
  Coverage   55.50%   55.50%           
=======================================
  Files         909      909           
  Lines       58402    58402           
  Branches     4070     4070           
=======================================
  Hits        32415    32415           
  Misses      25882    25882           
  Partials      105      105           

Flag	Coverage Δ
packages	55.50% <ø> (ø)

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
thirdweb (esm)	54.18 KB (0%)	1.1 s (0%)	196 ms (+162.67% 🔺)	1.3 s
thirdweb (cjs)	193.71 KB (0%)	3.9 s (0%)	402 ms (+54.79% 🔺)	4.3 s
thirdweb (minimal + tree-shaking)	5.68 KB (0%)	114 ms (0%)	50 ms (+750.64% 🔺)	164 ms
thirdweb/chains (tree-shaking)	524 B (0%)	11 ms (0%)	16 ms (+939.64% 🔺)	26 ms
thirdweb/react (minimal + tree-shaking)	19.53 KB (0%)	391 ms (0%)	53 ms (+337.39% 🔺)	444 ms