[kvlonge]

Why

[defaults].contract already supplies the effective contract policy for models, and contract Rules evaluate that effective configuration. Sources still required a repeated contract: enforced field on every declaration, so one project-wide contract policy could not cover both resource types consistently.

Changes

• apply the project contract default to sources that do not declare a local policy
• preserve explicit source overrides such as contract: none
• verify SQBRCONTRACT101 accepts model enforcement inherited from project defaults
• add source binding coverage proving the inherited enforced policy is authoritative

Verification

• uv run pytest tests/integration/src/sqlbuild/compiler/pipeline/test_semantic_binding.py tests/integration/src/sqlbuild/cli/commands/main/test_rules.py -n auto --dist loadfile (72 passed)
• focused post-rebase contract-default tests (4 passed)
• make check-ci
• downstream 974-model static validation of project-wide model and source enforcement; this correctly exposed separately tracked pre-existing model type-proof debt rather than weakening the default
• public repository hygiene scan