docs(readme): add table of contents

Round 2 of the AAA+ program, B-axis: a 415-line README with 11 H2
sections had no navigation aid, forcing scroll-to-scan.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CmKk4ryAX8Fhu91hCi4azN

README.md

@@ -23,6 +23,20 @@ verdicts. This is the **Claude Agent SDK** implementation of that method (decisi
 > the legal basis for any processing. The framework ships only the technical
 > preconditions: local-only operation, first-class provenance, no silent data egress.
 
+## Table of Contents
+
+- [Install](#install)
+- [Non-goals](#non-goals)
+- [Built from the spec — and, since 2026-08-09, in the open against the sibling](#built-from-the-spec--and-since-2026-08-09-in-the-open-against-the-sibling)
+- [Architecture — the seams](#architecture--the-seams)
+- [The operator CLI](#the-operator-cli)
+- [Setting up a knowledge base](#setting-up-a-knowledge-base)
+- [The ingest layer — CSV and SQL, in front of the loop](#the-ingest-layer--csv-and-sql-in-front-of-the-loop)
+- [The live run — S10, executed and validated](#the-live-run--s10-executed-and-validated)
+- [Stack](#stack)
+- [Development](#development)
+- [Changelog](#changelog)
+
 ## Install
 
 Not published to a package index — this repo is consumed from source, with `uv`: