refactor(firmware): centralize configuration and diagnostics

firmware/libs/kaptan-config/src/lib.rs

@@ -3,7 +3,9 @@
 //! This crate has no knowledge of MAVLink, filesystems, board routing, motors,
 //! or a particular airframe. It owns the staged-versus-active lifecycle and
 //! parameter metadata; vehicle crates provide the typed schema and complete
-//! validation. CBOR storage and MAVLink transport are separate adapters.
+//! validation. Persistence framing and transports remain separate adapters;
+//! this crate provides only the bounded scalar snapshot payload shared by
+//! storage backends.
 
 #![no_std]
 
@@ -11,15 +13,24 @@ extern crate self as kaptan_config;
 
 pub mod error;
 pub mod field;
+pub mod journal;
 pub mod lifecycle;
+pub mod snapshot;
 pub mod storage;
 pub mod validation;
 
 pub use error::{ConfigViolation, ValidationRule};
 pub use field::{
-    ApplyPolicy, ConfigModel, ConfigValue, FieldDescriptor, FieldId, FieldWriteError, ValueKind,
+    ConfigModel, ConfigScalar, ConfigValue, EnumOption, FieldDescriptor, FieldId, FieldWriteError,
+    MAX_ENUM_OPTION_LABEL_BYTES, MAX_ENUM_OPTIONS_PER_FIELD, ScalarValueError, ValueKind,
 };
-pub use kaptan_config_derive::ConfigValidate;
+pub use journal::{DualSlotJournal, DualSlotNor, JournalError};
+pub use kaptan_config_derive::{Config, ConfigEnum};
 pub use lifecycle::{BeginError, CommitError, ConfigManager, ConfigState, SetError, StartupError};
-pub use storage::{Generation, ProfileStore};
-pub use validation::{ConfigAggregate, ConfigSection, ValidateFields};
+pub use snapshot::{
+    SCALAR_SNAPSHOT_ENTRY_LENGTH, SCALAR_SNAPSHOT_HEADER_LENGTH, SCALAR_SNAPSHOT_VERSION,
+    ScalarSnapshotDecodeError, ScalarSnapshotEncodeError, SnapshotModelError,
+    decode_scalar_snapshot, encode_scalar_snapshot, scalar_snapshot_length,
+};
+pub use storage::ConfigStore;
+pub use validation::Config;