Adds a custom PocketBase binary (cmd/pocketbase) that embeds PocketBase as a
Go framework with version-controlled migrations, replacing the fragile 419-line
shell script. Migrations apply automatically on every `serve` startup.
Migration 1 (20260414000001): full baseline schema — all 21 collections, both
indexes on chapters_idx, and initial superuser creation from env vars.
Migration 2 (20260414000002): adds three fields found in code but missing from
the old script — books.rating, app_users.notify_new_chapters_push,
book_comments.chapter.
docker-compose: pocketbase service now uses the custom kalekber/libnovel-pocketbase
image; pb-init one-shot container removed (migrations replace it entirely).
Existing installs: run `migrate history-sync` once to mark migration 1 as done,
then restart — migration 2 will apply the three previously missing fields.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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