fix(addon): seed ab.ai.bot and agent registry on install

The bot DM flow silently failed because ab_ai_mail.message_post override
bails when no active ab.ai.bot row exists, and the agent service loaded
0 agents from an empty ab.ai.agent.registry. Both tables stayed empty
because nothing populated them.

The post_init/post_migrate hook now seeds:
- One active ab.ai.bot pointing at http://activeblue-agent:8001
- The 8 specialist agents (finance, accounting, crm, sales, project,
  elearning, expenses, hr) plus master, all on the ollama backend

Idempotent: skips rows that already exist.

addons/activeblue_ai/__init__.py

@@ -3,6 +3,42 @@ import logging
 
 _logger = logging.getLogger(__name__)
 
+DEFAULT_AGENTS = [
+    ('master',     'Routing / orchestration'),
+    ('finance',    'Finance reporting and analysis'),
+    ('accounting', 'Accounting, journals, reconciliation'),
+    ('crm',        'CRM, leads, opportunities'),
+    ('sales',      'Sales orders, quotations, customers'),
+    ('project',    'Project management and tasks'),
+    ('elearning',  'eLearning courses and content'),
+    ('expenses',   'Expense reports and approvals'),
+    ('hr',         'Human Resources, employees, time off'),
+]
+
+
+def _ensure_default_bot_and_registry(env):
+    """Seed an active ab.ai.bot row and the default agent registry entries."""
+    Bot = env['ab.ai.bot']
+    if not Bot.search([], limit=1):
+        Bot.create({
+            'display_name': 'ActiveBlue AI',
+            'agent_service_url': 'http://activeblue-agent:8001',
+            'privacy_mode': 'local',
+            'active': True,
+        })
+        _logger.info('Seeded default ab.ai.bot row')
+
+    Registry = env['ab.ai.agent.registry']
+    for name, domain in DEFAULT_AGENTS:
+        if not Registry.search([('agent_name', '=', name)], limit=1):
+            Registry.create({
+                'agent_name': name,
+                'domain': domain,
+                'active': True,
+                'backend': 'ollama',
+            })
+    _logger.info('Ensured %d default agent registry entries', len(DEFAULT_AGENTS))
+
 
 def _ensure_ai_bot_user(env):
     """Create the ActiveBlue AI internal user so it appears in Discuss DM search.
@@ -54,3 +90,5 @@ def _ensure_ai_bot_user(env):
             (user.id, user.id),
         )
         _logger.info('Marked ActiveBlue AI bot user id=%d as confirmed', user.id)
+
+    _ensure_default_bot_and_registry(env)