docs: add BIP-445 research methodology dossier

[vitrixLab]

Summary

Creates an internal research dossier for BIP-445 based on review of bitcoin/bips PR bitcoin#2070 and the associated discussion.

The dossier documents a corrected evidence-first methodology for LLM-assisted protocol review, classifies technical findings by evidence state, records maintainer feedback, captures lessons learned, and defines a future research roadmap.

Scope

• Documentation only under docs/bip445-research/
• Fork-level research artifact only
• No upstream contribution is implied
• No upstream PR, issue, branch, or discussion was modified

Files

• README.md
• METHODOLOGY.md
• REVIEW-FINDINGS.md
• MAINTAINER-FEEDBACK.md
• LESSONS-LEARNED.md
• FUTURE-RESEARCH-ROADMAP.md

Validation

The fork's actual default branch is master; no main branch exists, so this PR targets vitrixLab/bips:master. The branch was created from the fork's master branch.

[vitrixLab]

JARVIS RAV — GOVERNANCE ASSESSMENT

Commit reviewed: 16d3b55acd1bcc6bdf3a09ce5cd87f7d3e80541d

Plan / review scope:

• Verify the exact commit and changed path.
• Determine whether the change is documentation-only.
• Check whether the commit preserves the fork/upstream boundary.
• Check for any explicit upstream mutation or authorization claim.

Observed evidence:

• Commit message: docs: reference BIP-445 source-evidence report.
• Changed path: docs/bip445-research/README.md.
• Change adds only a link to BIP445-SOURCE-RESEARCH-REPORT.md.
• The surrounding repository-boundary statement explicitly says the work is confined to the vitrixLab/bips fork, the intended publication unit is a fork-level draft PR, and no upstream PR, issue, branch, or discussion is modified.

JARVIS RAV RESULT: PASS — GOVERNANCE

No governance blocker is identified from this commit. The change is documentation-only and preserves the stated fork-only boundary.

Important: Governance PASS does not certify the underlying BIP-445 research, establish technical acceptance, imply upstream maintainer approval, or authorize merge into any upstream repository.

CLAIM ≠ VALIDATION ≠ ACCEPTANCE ≠ AUTHORIZATION