All 8 TIMESTAMP columns in Postgres CREATE TABLE statements changed to
TIMESTAMPTZ. Migration ALTER TYPE statements added for existing databases
(converts assuming stored values are UTC).
Prevents timezone-shifted instants on non-UTC Postgres servers, which
would skew SLA math and maintenance-window checks. SQLite unaffected —
DATETIME is typeless.
Every Store interface method (except Close) now takes context.Context
as first parameter. All 54 db.Query/Exec/QueryRow calls in SQLStore
replaced with their *Context variants. DB operations now respect
cancellation and deadlines.
Context sources by caller:
- Engine dbWriter/poll/pruner: engine ctx from Start()
- HTTP handlers: r.Context()
- config.Apply/Export: caller-provided ctx
- TUI/main.go init: context.Background()
RunCheck and all sub-checks (HTTP/ping/port/DNS) accept parent ctx.
HTTP checks now inherit shutdown cancellation instead of rooting in
context.Background(). dbWrite.exec takes ctx so the writer goroutine
can cancel stuck DB operations.
DeleteSite/ImportData use BeginTx(ctx) instead of Begin().
lerko
