feat: Implement runtime API cache store and related configurations

- Added RuntimeApiCacheStore for managing API cache entries in memory.
- Introduced StorageTarget enum to define various storage targets.
- Created StoredCacheEntry record to encapsulate cache entries.
- Defined SyncState enum to represent the synchronization state of cache entries.
- Added ControlPlaneConfigurationSource enum for different configuration sources.
- Developed ControlPlaneRuntimeConfig class for runtime configuration management.
- Implemented ControlPlaneStartupConfigResolver for resolving configuration from various sources.
- Created ControlPlaneStartupSettings to hold startup configuration values.
- Added ResolvedControlPlaneStartupConfig record to encapsulate resolved configuration.
- Implemented tests for batch client and cache client functionalities.
- Added tests for ControlPlaneStartupConfigResolver to validate configuration resolution logic.

docs/wiki/Control-Plane-Client.md

@@ -0,0 +1,82 @@
+# Control Plane Client
+
+`ControlPlaneClient` is the main public entry point for plugins.
+
+```java
+ControlPlaneClient client = NetworkPlugin.client();
+```
+
+## Public Clients
+
+```java
+client.server();    // ServerClient
+client.presence();  // PresenceClient
+client.players();   // PlayersClient
+client.batch();     // BatchClient
+client.cache();     // ApiDataCacheClient
+```
+
+## Handwritten Domain Clients
+
+`ServerClient`
+
+```java
+ServerProfile profile = client.server().currentProfile();
+```
+
+`PresenceClient`
+
+```java
+client.presence().register(instanceId, registrationPayload);
+client.presence().heartbeat(instanceId, HeartbeatPayload.running(12, 150));
+client.presence().shutdown(instanceId, "restart");
+```
+
+`PlayersClient`
+
+```java
+PlayerSessionProfile profile = client.players().getSessionProfile(playerId);
+List<PlayerEntitlement> entitlements = client.players().getEntitlements(playerId);
+```
+
+## Error Handling
+
+Transport errors use checked `ControlPlaneException` subclasses:
+
+- `AuthException` for `401` and `403`
+- `NotFoundException` for `404`
+- `ValidationException` for `422`
+- `RemoteException` for `5xx`
+- `ControlPlaneException` for other transport or parsing failures
+
+Example:
+
+```java
+try {
+    ServerProfile profile = client.server().currentProfile();
+} catch (AuthException e) {
+    // token is missing, invalid, inactive, or lacks ability
+} catch (ControlPlaneException e) {
+    // generic control-plane failure
+}
+```
+
+## Endpoint Descriptors
+
+Generated endpoint descriptors are available under:
+
+```text
+net.kewwbec.network.generated.api.v1
+```
+
+Use them for stable route metadata and URI templates. Resolve path variables with `PathBuilder`.
+
+```java
+String uri = PathBuilder.resolve(
+    SessionProfileEndpoint.VALUE.uri(),
+    "player",
+    playerId
+);
+```
+
+Do not edit generated descriptors manually. Update routes in `core-control-plane`, then run the SDK sync command from that repo.