Restore approved state (tree of 4effcc7 "Added LICENSE")

Roll the working tree back to the last approved shape, before the post-LICENSE span that false-greened the AFI parity matrix with symbol-presence probes and smuggled an unauthorized SQLAlchemy dependency into FastAPI's Shapes binding.

Forward commit, not a history rewrite — the six commits since 4effcc7 stay in the log as the record of what happened.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/afi/fixture.py

@@ -7,11 +7,7 @@ exercise the protocol axes both backends must agree on:
 - two context functions sharing a param (proves bundling + param elevation)
 - a mutation declaring `affects` on the context
 
-This fixture is deliberately minimal: it exercises the axes the *IR-shape*
-parity test (`test_codegen_parity.py`) needs to compare. It intentionally omits
-channels / forms / shapes — NOT because those are outside the AFI (they are
-AFI-common; see `manifest.py`), but because their per-adapter wiring is gated by
-the *capability* parity suite (`test_capability_parity.py`), not by IR-shape.
+No channels, no forms, no shapes — those aren't AFI-common.
 
 `register_fixture()` registers the functions with mizan_core.registry.
 Backend test apps import this module and call register_fixture() during