feat(remote): support sqlite object uploads

[vincentkoc]

Summary

• add a typed remote SQLite upload API for Worker-backed archive objects
• include SQLite object metadata in remote status payloads
• advertise the publisher upload route in the remote contract

Verification

• GOWORK=off go test ./remote
• GOWORK=off go test ./...
• GOWORK=off go vet ./...
• GOWORK=off go mod tidy
• git diff --exit-code -- go.mod go.sum

[clawsweeper]

ClawSweeper status: review started.

I am starting a fresh review of this pull request: feat(remote): support sqlite object uploads This is item 1/1 in the current shard. Shard 0/1.

This placeholder means the worker is alive and reading the current context. I will edit this same comment with the actual review when the claws are done clicking.

Crustacean status: shell secured, claws on keyboard, evidence pebbles being sorted.