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Email sending service for notification alerts (module 1.1.11).
Uses plain SMTP via Python's standard library rather than a third-party
email API/SDK — this keeps the dependency footprint minimal and works
with any SMTP provider the client chooses (SendGrid, AWS SES, Gmail
SMTP relay, their own mail server, etc.) by just changing the .env
settings, with no code change.
Deliberately fails safe: if EMAIL_ENABLED is false or SMTP isn't
configured, send_email() logs and returns False rather than raising —
a notification email failing to send must never break the underlying
notification (which still exists and is visible in-app) or the
analysis flow that triggered it.
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