#3196: docs: clarify auth-profiles.json format for Claude Max setup-tokens

Fixes #3098 ## Summary - Add explicit `auth-profiles.json` format examples for setup-tokens in `docs/providers/anthropic.md` - Add comprehensive credential type examples in `docs/concepts/oauth.md` - Clarify that setup-tokens require `type: "token"` (not `"oauth"`) ## The Problem When configuring `auth-profiles.json` manually for Claude Max/Pro setup-tokens, using `type: "oauth"` with `accessToken` fails silently. The correct format is: ```json { "type": "token", "provider": "anthropic", "token": "sk-ant-oat01-..." } ``` ## Test plan - [x] Verify JSON examples are syntactically correct - [x] Cross-reference with source types in `src/agents/auth-profiles/types.ts` <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> This PR updates the documentation to prevent misconfigurations when manually editing per-agent `auth-profiles.json`, especially for Anthropic Claude subscription “setup-token” auth. It adds explicit JSON examples for the three credential shapes used by the auth profile store (`api_key`, `token`, and `oauth`) in `docs/concepts/oauth.md`, and adds a dedicated “Manual auth-profiles.json setup” section to `docs/providers/anthropic.md` that clarifies setup-tokens must use `type: "token"` (not `"oauth"` / `accessToken`). These changes align with the credential union in `src/agents/auth-profiles/types.ts` and should reduce silent failures from using the wrong credential type while keeping auth storage documentation centralized under the OAuth/token-sink concept. <h3>Confidence Score: 4/5</h3> - This PR is safe to merge; changes are documentation-only with low operational risk. - Edits are confined to docs and largely match the existing auth profile types, with only a small potential for minor schema drift in the OAuth example fields. - docs/concepts/oauth.md (OAuth example field names) <!-- greptile_other_comments_section --> _{(3/5) Reply to the agent's comments like "Can you suggest a fix for this @greptileai?" or ask follow-up questions!} <!-- /greptile_comment -->