docs: establish product technical gap baseline

[seonghobae]

Purpose

Create the executable product–technical gap baseline requested for TEPP.

Included

• derives the buyer workflow and feature specification from the approved PRD, TRD, Architecture, ERD, UML, Test Strategy, Operability, privacy/security contracts, ADRs, and research doctoring;
• records the current non-draft PR queue with base/head lineage, exact head, review state, merge state, and next loop;
• ranks buyer-visible gaps, including psychometric estimation, GPU parity, 3NF/hot-partition evidence, semantic/image units, live contextual-orchestrator execution, multilingual invariance, operability, and UI boundary;
• records intentional boundaries: smart crawling is out of scope, no cross-service table access, no blanket PII masking, and no fabricated Figma ID for this backend-only repository;
• updates the documentation map and CHANGELOG.md.

Verification

• python3 scripts/validate_documentation.py
• python3 scripts/check_workspace_contract.py
• python3 scripts/check_docstrings.py
• git diff --check

No product or scientific estimand is changed; no new ADR is required.

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📥 Commits

Reviewing files that changed from the base of the PR and between 7c29e7c and b52cdc0.

📒 Files selected for processing (3)

• CHANGELOG.md
• DOCUMENTATION.md
• docs/product-technical-gap-baseline.md

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[seonghobae]

Superseded by the newer canonical gap-baseline PR #164, which adds the same baseline plus required-document validation, live stack/issue state, and broader exact-head verification. Closing this duplicate to keep one authoritative documentation PR in the queue.

[seonghobae]

Closed as duplicate of canonical PR #164.