fix(deployment): Fix Docker Compose configuration and add deployment …

…targets

- Fix docker-compose.yml to use individual Dockerfiles from docker/ directory
- Remove container_name from services with replicas (incompatible config)
- Fix environment variable YAML syntax (use proper anchor merge)
- Remove obsolete version field for Docker Compose v2
- Update Dockerfiles to use latest stable Rust (rust:slim-bookworm)
- Fix .dockerignore to include Cargo.lock for reproducible builds
- Add docker-build-all and docker-compose-* targets to Makefile

This fixes the deployment issue where docker-compose was referencing
a non-existent root-level Dockerfile instead of the individual
Dockerfiles in the docker/ directory.

Co-Authored-By: Claude <noreply@anthropic.com>