docs(reports): three technical reports — architecture, pins-first methodology, performance (TASK-62)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: 2 people

backlog/tasks/task-62 - Technical-reports-architecture-methodology-performance-private-upstream-issues-review.md

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+---
+id: TASK-62
+title: >-
+  Technical reports: architecture, methodology, performance (+ private
+  upstream-issues review)
+status: In Progress
+assignee: []
+created_date: '2026-07-28 04:09'
+labels: []
+dependencies: []
+type: docs
+ordinal: 55000
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Write up the specializer work as standalone technical reports under docs/reports/: (1) architecture of the SQL specializer, (2) pins-first methodology (bug specifics redacted pending review), (3) performance report. Two further documents are PRIVATE pending AmirHossein's review — the DuckDB field-notes catalog and an upstream-issues report (DuckDB bugs found, sqlparser-rs gaps + upstream-fix feasibility, issues in other projects) — delivered in-chat only, NOT committed or published.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Three public reports committed under docs/reports/ and PR opened
+- [ ] #2 No DuckDB/upstream bug specifics in any committed or published text
+- [ ] #3 Field-notes catalog + upstream-issues report delivered to the user in chat only
+<!-- AC:END -->