[Sub-Task] Configuration & Lifecycle Re-alignment for Two-Pillar RAG

Origin Session ID: af26000d-914a-4eb0-8d28-2c09e9cb4cb5 Parent Epic: #9922

Context

As part of the Two-Pillar Hybrid RAG migration (replacing sqlite-vec with ChromaDB for dense vectors), the memory-core MCP server's configuration and startup sequences must be fundamentally rewired.

Technical Requirements

1. Configuration (config.mjs / config.template.mjs): Extract hardcoded sqlite-vec engine biases. Define explicit parameters for chromaHost, chromaPort, and native Graph tracking. The engine config must formally support a bifurcated hybrid paradigm as default.
2. System Lifecycle (SystemLifecycleService.mjs): Adjust the OS boot orchestrator to initialize both the SQLite Native Graph and the ChromaDB external dependency in strict sequential ordering. Ensure graceful degradation or crash-loops if Chroma is missing.
3. Inference & Chroma Lifecycles (InferenceLifecycleService.mjs, ChromaLifecycleService.mjs): Deprecate legacy flat-table logic. Re-establish robust .ping() logic to ChromaLifecycleService ensuring the Docker container or local server is responsive before launching memory operations.

Definitions of Done

• All touched files conform strictly to the 'Anchor & Echo' JSDoc protocol.
• Server boots and correctly authenticates both DB engines.