## Why

Nenjim's current bootstrap directly constructs and starts a hardcoded object graph, leaving ordinary applications without a typed catalogue of independently registered components. A small read-only Registry and a dedicated Registry manager establish component identity, lookup, composition, and lifecycle ownership without prematurely introducing Contexts, resolution, discovery, or runtime loading.

## What Changes

- Add `NenjimComponent` and `NenjimApplication` contracts plus a validated `NenjimComponentId` value type.
- Add a read-only `NenjimRegistryService`, package-private administration view, and thread-safe reference implementation with ordered interface indexing and single-use startup.
- Add `NenjimRegistryServiceManager` and its public reference implementation as the one composition root for the current hardcoded component set and explicit active application subset.
- **BREAKING**: Replace the old Hub interface, `com.r35157.nenjim.hubd.impl.ref.NenjimHubImpl` composition implementation, and `com.r35157.nenjim.hubd.impl.ref.Main` entry point with the thin `com.r35157.nenjim.hubd.Main` bootstrap, whose `Main.main(...)` only starts the Registry manager.
- Make every registered query interface a Nenjim component and make each registered no-argument lifecycle implementation a Nenjim application without adding a common stop contract.
- Replace the Ticker's temporary directly injected source objects with an injected public Registry view and explicitly configured source component IDs.
- **BREAKING**: Rename the directly affected Ticker price-source packages from `.plugins.pricesource` to `.pricesource` and update their imports and terminology.
- Document component identity, Registry views, application-owned selection/activation, manager-owned construction/registration, and the boundary around deferred runtime features.
- Preserve the current concrete component choices, dependency-safe startup order, deliberately inactive components, and online wait behavior.

## Capabilities

### New Capabilities

- `nenjim-component-registry`: Defines component/application contracts, component IDs, read-only lookup, internal registration, interface indexing, lifecycle, hardcoded composition, and bootstrap behavior.

### Modified Capabilities

- `assetaz-ticker-service`: Replaces temporary Context/plugin discovery language with explicit component-ID selection through the injected read-only Registry while preserving source lifecycle and history behavior.
- `assetaz-currency-identity-service`: Transfers ownership of the one shared hardcoded catalogue from the removed Hub composition implementation to the Registry service manager.

## Impact

- Adds public component and Registry APIs under `com.r35157.nenjim.component` and `com.r35157.nenjim.service.registry`, with administration and storage confined to `.impl.ref`.
- Moves current composition into `NenjimRegistryServiceManagerImpl`, changes the application main class, and removes the superseded Hub implementation path.
- Updates the registered domain interfaces and lifecycle implementation declarations needed for typed Registry discovery.
- Changes the public `TickerServiceImpl` construction contract and the Ticker price-source package names.
- Updates Nenjim, terminology, alarm, and OpenSpec documentation; no new dependency, ValueTag, persistent state, runtime discovery, Context, resolution, classloading, permission, event, removal, or common-stop API is introduced.
