docs: add DeviceAuthn enrollment and login sequence diagrams

[gaultier]

• https://mermaid.live/edit#pako:eNptUl2PmzAQ_CsrP6USIUBI72K1qU4kUqqq10hJ-1BFihxYwArY1Da5poj_XkO-Wt3xsDLemdmdXTcklgkSSjT-qlHEOOcsU6zcCrBfxZThMa-YMBAB0xAVHO15UMo9LxBYVb17jVx2yDkeeYyQM5W8MIUw2CwWo83q6xv4dYf_opiRGjSqI6ozJhrOZmsKq2_rDYw0Fumwy1rVUSEzLkas4tAwVlCwIXBAYapQ5xRSVmhszyLroVWJKASeBz0N0kK-QCOkNdveCy0paJ6JQX_vQNwb3R3wtOPJpednaRAUz3IDMgVL2HNZolE8Hq0-P0OlZFmZD3s1mlWKH5kFWzoItIagQHZEfRvHWXB56W0RzddPfXlm6mvy6v77m-Y_dS4-uq4LjW0hlwmFpJ84q00unL6L_zw4d_32Hzuya86W-YGKp6c7Bl64yUEbqTCBqt5bkV4zyjE-gJAQPYGdZZwzG7m2sz_KAyY9ZqGYxi5VFCgyfL2HRqPWXIqdsRzhwG2HLXFIpnhCqFE1OqREVbLulzSdypaYHEvcEmqPCaasLsyWbEVHsy_pp5TllalkneWE9i_BIXWV2HVcnvYNgiJBFclaGEKnvQKhDflNqO_7rhdOp75vgxeMw9Ahp-7aDcbeQ-hPPO9xEobToHXIn76o5z6-9yYPoTcOvIk_DcOw_QtOKRd8
• https://mermaid.live/edit#pako:eNp1U2FvmzAQ_Ssnf8okkpCUpA3aMlW0WqSuW9Vk-zBFilx8gBewmW3SZiz_fQeka7utfEC-473ne3dHzWItkIXM4o8KVYwXkqeGF2sF9JTcOBnLkisHEXALUS6Rzr1C38kcgZflm3-RiwZ5gTsZI2TciHtuEHqry8vh6ub6P_hlg78y3GkLFs0OTYeJ-vP5MoSbz8sVDC3mSb_5SqoUOCdVaoe8lNB7WKK1UquV3qI66i_7RI5CGPs-PKIhyfU91EqTTQ_wQdomvdni3h6eblyEkKJCKgevcN9r0UfRxVG0jts2NMyNFB7EaNwmzrhUR51P2iEYmWYOdAKkmCNPWhhkOhcWyuqOyG_vzHDOlQArU4UCSCLPUaX40v-X1-y_bwy9GwwGUBfoMi1CEG3beeUy5XXygrJ1l94oXpDzV6uHX8CdQ-u4o3ZupLaH54Y0TQaooK9oZLLv7HS8nYXzssxx-EHrlPbCaE0Lc27bCqIM4y1Etx-78Jq7OHuyCk6DddqQ_bbVLeYWv2PswOrENcszxKLKaR4Cmlm1iGVDObaRZmm4xb_b93wFqlK0_BerwDyWGilY6EyFHivQFLwJWd0IrJnLsMA1C-koMOFV7tZsrQ5Eo7X9pnXxyDS6SjMWJjy3FHV3Hf-jPxBUAk2kK-VYOJ62Eiys2QMLR6PRwA9ms9GIXv74JAg8tm_Sg_GJfxqMJr5_NgmC2fjgsZ_trf7gbOpPTgN_4k-C6eT0LDj8Bil5Qgo

Summary

• Add two mermaid sequence diagrams to docs/kratos/passwordless/08_deviceauthn.mdx: one for enrolling a DeviceAuthn key (settings flow) and one for using an existing key to step up AAL (login flow).
• Diagrams are rendered via mermaid.ink static image URLs (matching the existing pattern in docs/oathkeeper/index.mdx, since @docusaurus/theme-mermaid is not registered)

Test plan

• npm run start and verify both diagrams render as images in the "Enrollment" and "Proof of device enrollment" sections.
• Click the diagrams and confirm they open the editable version on mermaid.live.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated code formatter configuration to exclude a specific directory from formatting operations.

[coderabbitai]

📝 Walkthrough

Walkthrough

The .prettierignore file is updated to add a single ignore pattern, .claude, which prevents Prettier from formatting files or directories matching that path.

Changes

Prettier Configuration Update

Layer / File(s)	Summary
Exclude .claude from formatting .prettierignore	The .claude directory/file is added to Prettier's ignore patterns, preventing the formatter from processing matching paths.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• aeneasr
• zepatrik
• piotrmsc
• vinckr
• unatasha8

Poem

A rabbit's whisker twitches with delight,
One line of code, so tiny and so right,
.claude joins the ignore list with care,
Prettier knows now: don't format me there! 🐰

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	PR description is primarily a screenshot and diagram links with minimal explanatory text; it lacks required sections from the template like Related Issue/Design Document, Checklist completion, and substantive justification.	Provide the description following the template: include a summary of changes, reference the related design document or issue, complete the checklist items, and explain the rationale for the changes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The PR title mentions adding DeviceAuthn sequence diagrams to documentation, which aligns with the primary change of adding two sequence diagrams to the docs/kratos/passwordless/08_deviceauthn.mdx file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch pgaultier-deviceauthn-sequence-diagrams

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