Add lifecycle support

[chris124567]

Close #172

[Copilot]

Pull request overview

Adds S3 bucket lifecycle configuration support end-to-end (S3 API routes → Sia backend → SQLite persistence) and introduces a background lifecycle loop to apply rules (abort incomplete multipart uploads and expire objects) based on prefix filters and time cutoffs.

Changes:

• Implement ?lifecycle bucket subresource (PUT/GET/DELETE) with lifecycle XML validation and cutoff calculations.
• Persist per-bucket lifecycle configurations in SQLite and add lifecycle cleanup queries for aborting multipart uploads / expiring objects (plus supporting indexes).
• Add a Sia background lifecycle loop and tests covering API behavior, validation, persistence, and on-disk cleanup effects.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
sia/sia.go	Extends the store interface and starts the lifecycle background loop.
sia/lifecycle.go	Implements lifecycle configuration storage/reading and periodic rule application (abort/expire + cleanup).
sia/lifecycle_test.go	Integration-style test asserting lifecycle rule application and disk cleanup.
sia/export_test.go	Exposes lifecycle application for testing.
sia/persist/sqlite/migrations.go	Adds DB migration for lifecycle config table + indexes for lifecycle queries.
sia/persist/sqlite/init.sql	Updates baseline schema with lifecycle config table + new indexes.
sia/persist/sqlite/lifecycle.go	Implements lifecycle configuration persistence and lifecycle-driven abort/expire queries.
sia/persist/sqlite/lifecycle_test.go	Unit tests for lifecycle persistence and cleanup queries.
s3/s3.go	Extends the backend interface with lifecycle configuration operations.
s3/messages.go	Adds XML message types for lifecycle configuration documents.
s3/lifecycle.go	Implements lifecycle request routing/handlers and lifecycle validation/cutoff logic.
s3/lifecycle_test.go	Exercises lifecycle API behavior, validation mapping, and access control.
s3/buckets.go	Routes ?lifecycle to the new lifecycle handlers; removes it from unsupported subresources.
internal/testutil/testutil.go	Adds AWS SDK convenience wrappers for lifecycle APIs in tests.
README.md	Documents lifecycle support and updates the supported-operations table.
.golangci.yml	Disables the revive confusing-naming rule.
.changeset/add_lifecycle_support.md	Adds a changeset entry for lifecycle support.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[chris124567]

AWS buckets have no lifecycle policy by default... not sure what we want to do here