[IXI-2773]

Exact upstream source copies

• Imported 37 source files from 3 independent upstream projects: elceef/dnstwist (CLI subset, Apache-2.0), tomnomnom/assetfinder (MIT), and tomnomnom/httprobe (MIT).
• Source files copied verbatim at pinned revisions. File identities checked against upstream Git blobs, with included upstream LICENSE and original docs. No rewrites of original tool code.
• Added independent manifest, original-author attribution in project indexes, and a narrow hash/syntax checker in existing catalog CI.
• No third-party tool was built or run; no domain discovery, scanning, or detection results claimed. Imported code remains distinct from original portfolio projects.
• Avoids running full test suite; expected check is existing catalog job with new narrow source-integrity check.

Boundary

dnstwist includes CLI, dictionaries and text docs, not its optional webapp, original README symlink, or binary demos. Both tomnomnom repositories are copied in full for text/source files. All future execution requires separately documented authorized scope and evidence.