docs: explore library, project and organ responsibilities

[Jammy2211]

This note proposes library, project and organ roles for agent context selection
and action routing. It distinguishes those roles from repository categories and
their existing release contracts, using visualization as the current case and
profiling/inference as future cross-project aggregation domains.

The proposal includes an ownership diagram/table, three routing examples,
minimal contract recommendations and staged follow-ups. It does not adopt policy
or create organs. Independent Claude Fable review findings have been resolved.

Closes #440.

Scripts Changed

None. Adds docs/research/ecosystem_levels.md only.

Validation

• Sphinx HTML build: passed, zero warnings (baseline 0).
• 32 citations to 17 inspected, commit-pinned source files verified.
• Whitespace and all five research acceptance criteria checked.
• Independent Claude Fable 5.1 final draft review: CLEAN.
• Scientific smoke: not applicable; no executable or library changes.

Human-authorized Heart RED override (development only)

The live user replied "yes do it", then "I authorize", to the explicit request:
"Authorize a development-only Heart RED override for #440 to commit, push and open the PR?"
This authorizes task ecosystem-layers, issue #440, branch feature/ecosystem-layers,
for commit, push and PR creation only. No merge, release, rehearsal or CI bypass.

Current Heart verdict: RED; re-read from readiness in this shipping turn,
snapshot 2026-10-01T17:10:05.266085+00:00. Exact RED reason:

• release validation FAILED (stage integrate)

Other current readiness reasons:

• workspace validation not passing (0 failed, 1 timeout, cloud#36404726969: autolens_test scripts/multi_dataset/rectangular.py)
• manifest drift: public front-door organ tables (generated) — 1 mismatch(es) vs PyAutoMind/repos.yaml
• manifest drift: workspace checkouts (manifest ↔ disk) — 1 mismatch(es) vs PyAutoMind/repos.yaml

Passed branch evidence: Sphinx HTML build with zero warnings (baseline zero);
32 citations to 17 commit-pinned source files verified; whitespace clean;
independent Claude Fable 5.1 final draft review CLEAN. Scientific smoke is not
applicable to this one-file research Markdown change. The reviewed SHA256 is
3345cd00f3354c428426ef87d9092ef7683ca570e5c3bb8941d1abc860ef9d0b and remains unchanged.
This is independent local-draft review evidence, not a claim that Fable reviewed
a committed branch head. The commit will contain that exact reviewed artifact.
Heart remains RED for release purposes; this note does not repair Heart.