79 extensible streamable registry remove closed dispatcher add builder registration

[lxsaah]

Summary

• Open up type registration: Replace the closed for_each_streamable() + StreamableVisitor pattern with .register::<T>() builder methods on WebSocketConnectorBuilder and WasmDb, allowing users to register their own Streamable types
• Pure traits crate: Remove built-in struct definitions (Temperature, Humidity, GpsLocation) from aimdb-data-contracts and move them to weather-mesh-common example code — the crate is now a pure traits crate at v0.1.0, publishable to crates.io
• New StreamableRegistry: Add type-erased dispatch registry in aimdb-websocket-connector using monomorphized closures (no Box<dyn Any> on the hot path)
• WASM adapter made cloneable: SchemaRegistry closures changed from Box to Arc, enabling cheap cloning between WasmDb and WsBridge
• Publish chain updated: aimdb-data-contracts added as position 5/18 in make publish; all path-only deps now include version constraints for crates.io compatibility
• Embassy dependency update: Bumped embassy deps to latest versions, arch-cortex-m → platform-cortex-m

Breaking changes

• for_each_streamable() and StreamableVisitor removed from aimdb-data-contracts
• contracts module removed from aimdb-data-contracts — import types from your own crate
• SchemaRegistry::build() → SchemaRegistry::new() + .register::<T>() calls
• Connectors no longer auto-discover types — explicit .register::<T>() required

[Copilot]

Pull request overview

This PR makes the Streamable type system extensible by replacing the closed visitor-based discovery mechanism with explicit .register::<T>()-style registration across connectors/adapters, while moving demo contract structs out of aimdb-data-contracts to keep it publishable as a traits-only crate.

Changes:

• Introduces an explicit registration API (.register::<T>()) for WebSocket and WASM adapters and removes the for_each_streamable + StreamableVisitor pattern.
• Adds a type-erased StreamableRegistry to the WebSocket connector and makes the WASM SchemaRegistry cloneable via Arc-wrapped closures.
• Updates example crates and dependency versions (including Embassy) and adjusts the publish chain to include aimdb-data-contracts v0.1.0.

Reviewed changes

Copilot reviewed 34 out of 35 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
examples/weather-mesh-demo/weather-station-gamma/Cargo.toml	Enables weather-mesh-common simulation features and updates Embassy executor feature flag.
examples/weather-mesh-demo/weather-station-beta/Cargo.toml	Enables weather-mesh-common features needed for linking/migration/simulation.
examples/weather-mesh-demo/weather-station-alpha/Cargo.toml	Enables weather-mesh-common features needed for linking/migration.
examples/weather-mesh-demo/weather-mesh-common/src/lib.rs	Moves demo contract types to local contracts module and re-exports traits.
examples/weather-mesh-demo/weather-mesh-common/src/contracts/temperature.rs	Adds demo Temperature contract with migration + simulation + linkability behind features.
examples/weather-mesh-demo/weather-mesh-common/src/contracts/mod.rs	Aggregates and re-exports demo contract modules.
examples/weather-mesh-demo/weather-mesh-common/Cargo.toml	Adds feature-gated deps for link/sim/migrate in demo contracts crate.
examples/weather-mesh-demo/weather-hub/Cargo.toml	Enables weather-mesh-common linking/migration features for hub usage.
examples/embassy-mqtt-connector-demo/Cargo.toml	Updates Embassy executor feature flag to new naming.
examples/embassy-knx-connector-demo/Cargo.toml	Updates Embassy executor feature flag to new naming.
aimdb-websocket-connector/src/registry.rs	Adds new registry for type-erased Streamable dispatch and lookup + tests.
aimdb-websocket-connector/src/lib.rs	Exposes the registry module under the server feature.
aimdb-websocket-connector/src/builder.rs	Replaces closed discovery with explicit .register::<T>() registration and uses registry for known topics.
aimdb-websocket-connector/Cargo.toml	Adds versions to internal deps for crates.io compatibility.
aimdb-wasm-adapter/src/schema_registry.rs	Replaces visitor-built registry with explicit registration and makes entries cloneable via Arc.
aimdb-wasm-adapter/src/bindings.rs	Switches to SchemaRegistry::new() and adds Rust-only .register::<T>() API on WasmDb.
aimdb-wasm-adapter/Cargo.toml	Aligns aimdb-data-contracts version with the new v0.1.0.
aimdb-mqtt-connector/Cargo.toml	Bumps Embassy dependency versions (path-based) for embedded support.
aimdb-knx-connector/Cargo.toml	Bumps Embassy dependency versions (path-based) for embedded support.
aimdb-data-contracts/src/streamable.rs	Removes visitor/discovery API and updates docs/tests to reflect explicit registration model.
aimdb-data-contracts/src/observable.rs	Updates docs to avoid importing removed contracts module.
aimdb-data-contracts/src/migratable.rs	Updates docs to reference user-defined contract types and new naming.
aimdb-data-contracts/src/linkable.rs	Reworks tests to use local test-only structs (no built-in contracts).
aimdb-data-contracts/src/lib.rs	Makes crate a traits-focused surface (removes contracts module export) and updates docs.
aimdb-data-contracts/src/contracts/temperature.rs	Removes built-in Temperature contract implementation from the traits crate.
aimdb-data-contracts/src/contracts/mod.rs	Removes built-in contracts module surface.
aimdb-data-contracts/src/contracts/location.rs	Adjusts existing contract code (but contracts module is no longer exported).
aimdb-data-contracts/src/contracts/humidity.rs	Adjusts existing contract code (but contracts module is no longer exported).
aimdb-data-contracts/Cargo.toml	Sets crate version to v0.1.0, removes ts-rs feature, and adds versions to internal deps.
_external/mountain-mqtt	Updates submodule pointer.
_external/knx-pico	Updates submodule pointer.
_external/embassy	Updates submodule pointer.
Makefile	Inserts aimdb-data-contracts into publication order and updates progress counters.
Cargo.toml	Updates workspace-pinned Embassy dependency versions and executor feature flag.

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