v2 phase 1: foundation — types, DB layer, logging

Add the v2 data layer: typed interfaces, central DB with migration
runner, per-entity CRUD, and agent-runner session DB operations.

- src/log.ts: concise message-first logging API
- src/types-v2.ts: AgentGroup, MessagingGroup, Session, MessageIn/Out
- src/db/: connection (WAL), migration runner, 001-initial schema,
  CRUD for agent_groups, messaging_groups, sessions, pending_questions
- container/agent-runner/src/db/: session DB connection, messages_in
  reads + status transitions, messages_out writes
- 31 new tests, all 277 tests pass

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/db/messaging-groups.ts

@@ -0,0 +1,98 @@
+import type { MessagingGroup, MessagingGroupAgent } from '../types-v2.js';
+import { getDb } from './connection.js';
+
+// ── Messaging Groups ──
+
+export function createMessagingGroup(group: MessagingGroup): void {
+  getDb()
+    .prepare(
+      `INSERT INTO messaging_groups (id, channel_type, platform_id, name, is_group, admin_user_id, created_at)
+       VALUES (@id, @channel_type, @platform_id, @name, @is_group, @admin_user_id, @created_at)`,
+    )
+    .run(group);
+}
+
+export function getMessagingGroup(id: string): MessagingGroup | undefined {
+  return getDb().prepare('SELECT * FROM messaging_groups WHERE id = ?').get(id) as MessagingGroup | undefined;
+}
+
+export function getMessagingGroupByPlatform(channelType: string, platformId: string): MessagingGroup | undefined {
+  return getDb()
+    .prepare('SELECT * FROM messaging_groups WHERE channel_type = ? AND platform_id = ?')
+    .get(channelType, platformId) as MessagingGroup | undefined;
+}
+
+export function getAllMessagingGroups(): MessagingGroup[] {
+  return getDb().prepare('SELECT * FROM messaging_groups ORDER BY name').all() as MessagingGroup[];
+}
+
+export function updateMessagingGroup(
+  id: string,
+  updates: Partial<Pick<MessagingGroup, 'name' | 'is_group' | 'admin_user_id'>>,
+): void {
+  const fields: string[] = [];
+  const values: Record<string, unknown> = { id };
+
+  for (const [key, value] of Object.entries(updates)) {
+    if (value !== undefined) {
+      fields.push(`${key} = @${key}`);
+      values[key] = value;
+    }
+  }
+  if (fields.length === 0) return;
+
+  getDb()
+    .prepare(`UPDATE messaging_groups SET ${fields.join(', ')} WHERE id = @id`)
+    .run(values);
+}
+
+export function deleteMessagingGroup(id: string): void {
+  getDb().prepare('DELETE FROM messaging_groups WHERE id = ?').run(id);
+}
+
+// ── Messaging Group Agents ──
+
+export function createMessagingGroupAgent(mga: MessagingGroupAgent): void {
+  getDb()
+    .prepare(
+      `INSERT INTO messaging_group_agents (id, messaging_group_id, agent_group_id, trigger_rules, response_scope, session_mode, priority, created_at)
+       VALUES (@id, @messaging_group_id, @agent_group_id, @trigger_rules, @response_scope, @session_mode, @priority, @created_at)`,
+    )
+    .run(mga);
+}
+
+export function getMessagingGroupAgents(messagingGroupId: string): MessagingGroupAgent[] {
+  return getDb()
+    .prepare('SELECT * FROM messaging_group_agents WHERE messaging_group_id = ? ORDER BY priority DESC')
+    .all(messagingGroupId) as MessagingGroupAgent[];
+}
+
+export function getMessagingGroupAgent(id: string): MessagingGroupAgent | undefined {
+  return getDb().prepare('SELECT * FROM messaging_group_agents WHERE id = ?').get(id) as
+    | MessagingGroupAgent
+    | undefined;
+}
+
+export function updateMessagingGroupAgent(
+  id: string,
+  updates: Partial<Pick<MessagingGroupAgent, 'trigger_rules' | 'response_scope' | 'session_mode' | 'priority'>>,
+): void {
+  const fields: string[] = [];
+  const values: Record<string, unknown> = { id };
+
+  for (const [key, value] of Object.entries(updates)) {
+    if (value !== undefined) {
+      fields.push(`${key} = @${key}`);
+      values[key] = value;
+    }
+  }
+  if (fields.length === 0) return;
+
+  getDb()
+    .prepare(`UPDATE messaging_group_agents SET ${fields.join(', ')} WHERE id = @id`)
+    .run(values);
+}
+
+export function deleteMessagingGroupAgent(id: string): void {
+  getDb().prepare('DELETE FROM messaging_group_agents WHERE id = ?').run(id);
+}