fix(docs): restore README fence and unique-fold helper after #48 merge

[seonghobae]

Summary

#48 merged 04f05ea4 before post-merge repairs landed. Protected main currently fails docs/coverage and has a duplicated architecture table.

This draft carries only those repairs:

1. One balanced crate list of all 54 workspace members, including topic_measurement, analysis_engine, and psychometric_core.
2. A single live load_union_branch_totals plus a test that unions True/False counts across instrumented copies.
3. One location_membership, one validation_core, and one tepp_api row in the architecture foundation table, keeping terminal-result wording on the API row.

Does not change estimator contracts, lexical-weight labels, membership-fold overflow behavior, or ADR numbering.

Test plan

• python3 scripts/check_workspace_contract.py
• python3 scripts/check_docstrings.py
• python3 scripts/validate_documentation.py
• python3 -m coverage run --branch -m unittest discover -s tests/quality -p 'test_*.py'
• python3 -m coverage report --fail-under=100 --show-missing (1336/662)

Exact-head GitHub CI still required. Independent OpenCode APPROVE remains an org gate; this PR stays draft until that path is available.

  

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[seonghobae]

Superseded by the canonical ready vehicle #224 (fix/main-red-readme-fence-dedupe, base main), which contains every repair in this PR with concrete evidence on its head: (1) README.md fence balance restored (balanced ``` fence pairs vs current main's odd count from the #48 merge fallout); (2) ARCHITECTURE.md duplicate foundation-crate rows collapsed to one row each for location_membership / validation_core / tepp_api with terminal-result wording retained; (3) scripts/check_coverage.py shadowed duplicate load_union_branch_totals removed (single definition at line 40 vs current main's definitions at lines 40+152). #224 additionally repairs post-consolidation crate-source fallout beyond this PR's scope and is mergeable against main. Closing this draft as duplicated by #224 to avoid two fix vehicles racing on identical regions of README.md/ARCHITECTURE.md/check_coverage.py.