Initial commit: CI Agent competitive-intelligence monitoring app

FastAPI + Celery + Next.js + Postgres/Redis app with company monitoring,
source collection, LLM-based change analysis, enrichment, and account
security (Turnstile, escalating lockout, email verification).

apps/api/app/notifications/smtp_email.py

@@ -0,0 +1,53 @@
+"""SMTP email provider. Points at Mailpit in local dev (see docker-compose.yml)
+and any real SMTP server in production - same code path either way. Uses
+stdlib `smtplib` off the event loop via `asyncio.to_thread` rather than
+adding an async SMTP dependency.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import smtplib
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+
+from app.core.config import Settings
+from app.core.logging import get_logger
+from app.notifications.base import DeliveryResult, NotificationMessage
+
+logger = get_logger(__name__)
+
+
+class SmtpEmailProvider:
+    provider_name = "smtp"
+
+    def __init__(self, settings: Settings) -> None:
+        self._settings = settings
+
+    async def send(self, message: NotificationMessage) -> DeliveryResult:
+        try:
+            await asyncio.to_thread(self._send_sync, message)
+            return DeliveryResult(success=True)
+        except Exception as exc:  # pragma: no cover - network/SMTP failure path
+            logger.error("smtp_send_failed", error=str(exc))
+            return DeliveryResult(success=False, error=str(exc))
+
+    def _send_sync(self, message: NotificationMessage) -> None:
+        mime_message = MIMEMultipart("alternative")
+        mime_message["Subject"] = message.subject
+        mime_message["From"] = self._settings.smtp_from_email
+        mime_message["To"] = message.destination_value
+        mime_message.attach(MIMEText(message.body_text, "plain"))
+        if message.body_html:
+            mime_message.attach(MIMEText(message.body_html, "html"))
+
+        with smtplib.SMTP(self._settings.smtp_host, self._settings.smtp_port, timeout=10) as server:
+            if self._settings.smtp_use_tls:
+                server.starttls()
+            if self._settings.smtp_username:
+                server.login(self._settings.smtp_username, self._settings.smtp_password)
+            server.sendmail(
+                self._settings.smtp_from_email,
+                [message.destination_value],
+                mime_message.as_string(),
+            )