refactor: migrate programs to LEZ lez-core-v0.2.0

Bump the LEZ dependency from the `v0.2.0-rc3` tags to the released
`lez-core-v0.2.0` tag across the workspace and all guest manifests. The crate
was renamed upstream, so `nssa_core`/`nssa` now resolve via the `lee_core`/`lee`
packages, and spel-framework points at the `refactor/lez-v020-compat` fork
branch for compatibility.

Adapt the integration tests to the new API surface:

- `NssaError` is now `LeeError` (error variants unchanged).
- Account inputs move from numeric mask vectors (`vec![2, 0, 0]`) to typed
  `InputAccountIdentity` values (e.g. `PrivateUnauthorized { epk, view_tag,
  npk, ssk, identifier }`).
- `ViewingPublicKey::from_scalar` → `from_seed(d, z)`; `AccountId::from(&npk)`
  → `AccountId::for_regular_private_account(&npk, 0)`; ephemeral-key/shared-
  secret setup → `SharedSecretKey::encapsulate_deterministic(...)` with the
  circuit filling the EPK.

Regenerate all guest Cargo.lock files and the workspace lockfile to match.

programs/token/methods/guest/Cargo.toml

@@ -56,8 +56,8 @@ name = "token"
 path = "src/bin/token.rs"
 
 [dependencies]
-spel-framework = { git = "https://github.com/logos-co/spel.git", tag = "v0.3.0", package = "spel-framework" }
-nssa_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3" }
+spel-framework = { git = "https://github.com/0x-r4bbit/spel.git", branch = "refactor/lez-v020-compat", package = "spel-framework" }
+nssa_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "lez-core-v0.2.0", package = "lee_core" }
 risc0-zkvm = { version = "=3.0.5", default-features = false }
 # Pin ruint (transitive via risc0-binfmt) below 1.18, which raised its MSRV to
 # rustc 1.90. The risc0 guest toolchain ships rustc 1.88, so 1.18+ fails the