ADR 003 references config/schemas/workflows/ directory that does not exist

[ooloth]

Why

An agent or human looking for per-workflow schema docs will hunt for a directory that does not exist.

Current state

docs/decisions/003-config-model.md line 93 reads: "Per-workflow schemas live in config/schemas/workflows/ and document what each workflow accepts." The directory config/schemas/ contains only hub.toml.schema.json and README.md — no workflows/ subdirectory.

Ideal state

• The line is rewritten to describe the actual model: per-workflow object shapes live as workflow_<name> definitions inside config/schemas/hub.toml.schema.json
• OR the config/schemas/workflows/ directory is created and populated with the per-workflow schemas the ADR describes

Starting points

• docs/decisions/003-config-model.md line 93
• config/schemas/hub.toml.schema.json (see definitions section for actual per-workflow shapes)
• config/schemas/README.md

QA plan

1. Read docs/decisions/003-config-model.md around line 93 — expect no reference to a missing path
2. Verify the description of where per-workflow schema shapes live matches config/schemas/ as it actually exists

Done when

ADR 003 no longer references config/schemas/workflows/.