Rewrite export compliance to use correct ASC API flow

[trmquang93]

• Surface compliance status in BuildSelector for all builds, not just when compliance is missing (always show Edit/Manage button)
• Enrich attached build with complianceState from builds list
• Remove deprecated usesNonExemptEncryption from declaration API calls
• Rewrite PATCH handler to use correct ASC API approach:
  • "No encryption": PATCH build with usesNonExemptEncryption=false
  • "Yes + algorithm": POST new declaration, then PATCH build to link it
• Include usesNonExemptEncryption in build fields and derive compliance state as VALID when explicitly set to false

What

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Why

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Closes #

How

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Testing

How did you test this change?

• Tested manually against a real App Store Connect account
• Verified no console errors in browser
• Checked responsive layout (if UI change)