Establish secure account and managed AI backend

Provide the production foundation for Apple identity, immutable credits, referrals, integrity checks, managed providers, and hardened Docker deployment.

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
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+end_of_line = lf
+insert_final_newline = true
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+[*.{kt,kts}]
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+[*.{yaml,yml,json}]
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