docs: rewrite README — explain the adversarial premise, make it readable

docs: preserve review remediation sdlc state as of 2026-03-31

fix(cleanup): consolidate hook matchers, improve bead count fallback, update test fixtures

fix(contracts): consistent arg parsing, externalize Lindy thresholds, extend backfill to all lanes, update stale docs

fix(security): eliminate shell-to-Python injection in decision-noise scripts, add PyYAML guard to run-complete-gates

fix(data): centralize bc decimal normalization via json_decimal(), fix existing JSONL, add mkdir -p guards

docs: add handoff document for thinker enhancement + telemetry enforcement

fix: README hook event type PreToolUse → PostToolUse for warn-phase-transition.sh

feat: backfill telemetry — first real data in system ledgers

fix: add || true to classify_task_lanes conditionals for set -e safety

docs: add REQUIRED gate automation to orchestrate, gate, README

feat: add idempotent telemetry backfill script

fix: accept 'complete-local' in gate checker argument validator

fix: pre-append validation now runs FULL task-local complete gate

fix: implement pre-append validation, mirror sli check, add section validation