This commit fixes an issue where expressions were
silently failing when encountering undefined fields.
Instead they should be treating the undefined field like
the number zero. This is required to stay compatible with
how Tile38 handles zeros.
https://tile38.com/commands/intersects/#fields

Fixes #754

Fix discord link

All SQS FIFO queues have the `.fifo` suffix at the end of their URL - this is how we determine if we are using a FIFO queue or not. The `MessageGroupId` (A required field for FIFO) is set using the key & id of the event's message.

Note: This commit does not add the the `MessageDeduplicationID` so the FIFO queue must have content-based deduplication enabled.

Adds the ability to use SQS FIFO queues.

Upgrade base image in Dockerfile to alpine:3.20

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.21.0 to 0.31.0.
- [Commits](golang/crypto@v0.21.0...v0.31.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

…/x/crypto-0.31.0

Bump golang.org/x/crypto from 0.21.0 to 0.31.0

Bump golang.org/x/net from v0.23.0 to v0.33.0