# POST3-001: Create workspace skeleton

**Status:** Done
**Priority:** P0
**Blocked by:** —

## Description

Set up the Rust workspace with both crates, Docker Compose for PostgreSQL 18, and mise.toml dev tasks.

## Acceptance Criteria

- [ ] `Cargo.toml` workspace root with `crates/*` members
- [ ] `crates/post3/Cargo.toml` — library crate with sqlx, tokio, bytes, chrono, md-5, hex, thiserror, uuid, tracing, serde
- [ ] `crates/post3/src/lib.rs` — empty module declarations
- [ ] `crates/post3-server/Cargo.toml` — binary crate depending on post3, axum, clap, notmad, quick-xml, etc.
- [ ] `crates/post3-server/src/main.rs` — minimal tokio main
- [ ] `templates/docker-compose.yaml` — PostgreSQL 18 on port 5435
- [ ] `mise.toml` — tasks: up, down, dev, test, db:shell, db:migrate
- [ ] `cargo check --workspace` passes
- [ ] `mise run up` starts PostgreSQL successfully