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>

cores/mizan-rust/Cargo.toml

@@ -11,9 +11,6 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 async-trait = "0.1"
 mizan-macros = { path = "../mizan-rust-macros" }
-hmac = "0.12"
-sha2 = "0.10"
-base64 = "0.22"
 
 [dev-dependencies]
 indoc = "2"