feat: add user credential passthrough mode for projects#158

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crystalin wants to merge 15 commits intomainfrom

feat/account-less-projects-passthrough

Commits on Nov 4, 2025

feat: add user credential passthrough mode for projects

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fix: make MSL-Project-Id header mandatory for all requests

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fix: remove fallback to default project ID in middleware

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feat: add detailed logging for outbound Anthropic API requests

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feat: add detailed logging for outbound Anthropic API requests

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fix: pass through all client headers to Anthropic API

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fix: allow content-length and accept-encoding headers to pass through

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revert: restore content-length and accept-encoding to blacklist

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fix: remove authorization header masking from logs

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fix: stop masking authorization headers in logger

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fix: prioritize user Bearer token over project default account

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fix: make Bearer token highest priority in authentication

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fix: prevent duplicate Authorization header in passthrough mode

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docs: update ADR-030 and API reference for user passthrough mode

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docs: update ADR-030 header blacklist to match implementation

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