* docs: document pgvector preinstall for least-privilege DB roles
Honcho issues CREATE EXTENSION IF NOT EXISTS vector before migrations
and again at server startup, both using the DB_CONNECTION_URI role. On
deployments where that role deliberately cannot create extensions
(managed Postgres, Kubernetes operators, NixOS), both statements fail
with a privilege error — IF NOT EXISTS does not save you, because
Postgres checks the privilege before checking for the extension.
Document preinstalling pgvector as a privileged role as the supported
path, and add a troubleshooting entry keyed to the exact error string.
Note that docker compose is unaffected, since the bundled database
service creates the extension via an initdb script.
Refs #614
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* docs: clarify why docker compose avoids the pgvector privilege error
The previous wording pinned the claim entirely on database/init.sql,
which only runs on first boot of an empty data volume. The load-bearing
reason is that the bundled stack connects as the postgres superuser, so
it can create the extension regardless of volume state. Name that first
and keep init.sql as the secondary reason.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
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