scaffold v0.1: postgres+pgvector inside-container, schema, markdown ingest, CLI

Skald is a generic story-writer. The database is the product; the
binary is the tooling. Everything story-specific lives in rows, not
in code. cwho's monorepo + binary-per-role pattern transplanted to
this domain.

What this commit ships:
- Cargo workspace (resolver=3, edition 2024): skald-core (lib) +
  skald (bin)
- Migration 0001: stories, characters, canon_facts, chapters,
  chapter_summaries, passages (vector(1536)), generation_runs,
  audit_findings, tags. pgvector + pg_trgm extensions. ivfflat
  index deferred until we have data (post-import the first ~1k
  passages and add the index).
- skald-core::ingest — markdown parser for the cwho/coast-down shape:
  '# Title' → '## Chapter N — date' headings → '# Continuity Bible'
  section with character roster (real + fictional sub-sections) +
  setting / mystery / historical / liberty / hook sub-sections.
  Decomposed into structured rows; original bullet body preserved
  in key_facts/body fields for fidelity. 6 unit tests cover the
  shape.
- skald-core::db — Postgres connection pool + migration runner.
- skald-core::models — row types via sqlx::FromRow.
- skald binary — clap CLI: 'serve' (http + migrations) and
  'import-markdown' (one-shot ingest).
- Dockerfile — multi-stage: rust:1.95-bookworm builder, pgvector/
  pgvector:pg17 runtime, tini under PID 1, custom entrypoint.sh
  that boots embedded postgres then execs skald serve.
- compose.yml — singleton container, postgres data in volume,
  story corpus mounted read-only at /seed.

Decisions locked 2026-05-13:
1. DB in same container 'till we have a real working tool' (Sulkta)
2. postgres+pgvector (NOT sqlite) — keeps semantic-search story
3. Network-not-socket connection (postgresql://localhost:5432) from
   day one so future split is config-only, not code-rewrite

Not yet wired:
- Web UI
- clawdforge calls (gen → cleanup → canon-audit pipeline)
- Embedding pass
- TTS sidecar

Cargo.toml

@@ -0,0 +1,32 @@
+[workspace]
+resolver = "3"
+members = ["skald-core", "skald"]
+
+[workspace.package]
+version = "0.0.1"
+edition = "2024"
+license = "MIT"
+authors = ["Sulkta"]
+repository = "http://127.0.0.1:3001/Sulkta/skald"
+
+[workspace.dependencies]
+tokio = { version = "1", features = ["full"] }
+axum = "0.8"
+tower = "0.5"
+tower-http = { version = "0.6", features = ["trace", "limit"] }
+sqlx = { version = "0.8", default-features = false, features = [
+    "postgres", "runtime-tokio", "tls-rustls",
+    "chrono", "uuid", "macros", "migrate",
+] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+clap = { version = "4", features = ["derive", "env"] }
+anyhow = "1"
+thiserror = "2"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json", "chrono"] }
+chrono = { version = "0.4", features = ["serde"] }
+uuid = { version = "1", features = ["v4", "serde"] }
+regex = "1"
+async-trait = "0.1"
+maud = "0.27"