Initial commit: SIC harness (backend, web, pi-adapter, configs, docs)

- pnpm monorepo: apps/api (Fastify + SQLite + SSE), apps/web (React+Vite), packages/shared, packages/pi-adapter
- Local auth (admin/webhook-runner roles) + Keycloak JWT ready
- Multi-session chat with reliable history (user persisted before LLM, assistant persisted after stream)
- Markdown knowledge base with /api/docs/search + /api/docs/:id
- YAML webhook catalog with backend-only execution, retry/backoff, audit (webhook_runs), and per-user rate limit
- Skills config (sre-on-call, blameless-postmortem, security-incident) injected into LLM system prompt
- LLM provider failover chain (config/models.yml fallback + LLM_FALLBACK_CHAIN override)
- Context-aware webhooks panel + backend id-mention safety net
- Per-message stats (time/duration/tokens/model), Markdown+GFM render, code & table copy/download buttons
- Vitest suite, end-to-end smoke test (scripts/smoke.mjs), per-session system prompt override
- /metrics Prometheus endpoint + /api/metrics JSON, request-id correlation
- dotenv with explicit repo-root path; envString/envNumber helpers (handles empty-string env)
- Runbooks + SOPs under knowledge/ in English; README, docs, and INDEX.md in English

docs/reliable-history.md

@@ -0,0 +1,57 @@
+# Reliable History
+
+## Goal
+
+Guarantee that the chat history is reconstructible, isolated by user, and consistent even if the backend restarts.
+
+## Mandatory rules
+
+1. Persist the user message before calling the LLM.
+2. Persist the assistant response when the stream finishes.
+3. If the LLM fails, record the failure in metadata or as a controlled error message.
+4. Do not keep critical conversational state in memory.
+5. All session and message queries must filter by `session_id` AND `user_id`.
+6. Webhooks must be audited even when they fail.
+
+## Base tables
+
+```sql
+CREATE TABLE IF NOT EXISTS chat_sessions (
+  id TEXT PRIMARY KEY,
+  user_id TEXT NOT NULL,
+  title TEXT,
+  created_at TEXT NOT NULL,
+  updated_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS chat_messages (
+  id TEXT PRIMARY KEY,
+  session_id TEXT NOT NULL,
+  user_id TEXT NOT NULL,
+  role TEXT NOT NULL,
+  content TEXT NOT NULL,
+  metadata TEXT,
+  created_at TEXT NOT NULL,
+  FOREIGN KEY (session_id) REFERENCES chat_sessions(id)
+);
+
+CREATE TABLE IF NOT EXISTS webhook_runs (
+  id TEXT PRIMARY KEY,
+  webhook_id TEXT NOT NULL,
+  user_id TEXT NOT NULL,
+  session_id TEXT NOT NULL,
+  status TEXT NOT NULL,
+  request_payload TEXT,
+  response_status INTEGER,
+  created_at TEXT NOT NULL
+);
+```
+
+## Security invariant
+
+```sql
+WHERE session_id = ?
+AND user_id = ?
+```
+
+Without this filter, the query is incorrectly designed.