Improve source-specific research discovery and citation navigation

[GoGoKo699]

Summary

Add a research-question-based literature guide that helps readers and research assistants discover the relevant parts of this research line without making missing-citation accusations or priority claims.

• Eight substantive research questions and eight related papers, with mathematical connections and scope qualifications.
• Distinct attribution routes for the analytical note (arXiv:2204.01754), the published trajectory paper (Quantum 8, 1282), and later repository results.
• Link the guide from README, AI_CONTEXT.md, llms.txt, and the discovery vocabulary.
• Generate docs/RESEARCH_CONNECTIONS.md from metadata/research_connections.json through the existing make public-context workflow; regenerate llms-full.txt.
• Add eight regression tests and extend CI's generated-document consistency check.

Scope

Exactly 11 documentation, discovery metadata, generation, test, and CI files differ from the base. Scientific implementations, data, committed figures, public claim records, corrections, licenses, dependency locks, version metadata, and releases are unchanged. This update does not claim verified search-indexing or citation improvements.

Verification

The exact candidate tree 1a33c329f1f28f93285f22d402964fa81469ed49 passed the pinned Ubuntu 24.04 / CPython 3.11.15 environment checks, the complete 252-test suite, public repository validation, release safeguards, deterministic document regeneration, and public-figure source-data comparison.

Application run: https://github.com/GoGoKo699/Entanglement-Trajectories/actions/runs/37915426587

All verification steps passed there; its final push was rejected because the Actions token lacks workflow-file write permission. The same verified commit was subsequently published using the authorized GitHub connector. The ordinary PR checks will validate the published candidate independently.

Squash merge so temporary branch-only application files and their staging history do not enter main. Those files are absent from the final candidate.