Add AI Council architecture: Tier 2/3/Graph implementation + Integration Plan

Architecture (Agent 1):
- hermes_memory/tier2/{schema,facts,entities,relations,timeline}.py
- hermes_memory/tier3/{backend,chroma_backend,embedder}.py
- hermes_memory/graph/nx_store.py
- hermes_memory/api/memory_api.py (unified API)
- hermes_memory/cron/{consolidate,embed_queue,graph_refresh,prune}.py
- hermes_memory/config.py + pyproject.toml

Integration Plan (Agent 3):
- INTEGRATION_PLAN.md: Memory Provider Plugin strategy
- Hermes Core needs minimal changes
- sync_turn() + prefetch() hooks
- Skills integration via nextlevel_search/remember

Auto-Extraction (Agent 2):
- ARCHITECTURE.md: Full extraction pipeline docs
- Chunking, Pre-Filter, LLM Prompts, Classification
- Entity-Linking, Temporal Reasoning, Deduplication

All files: Python syntax checked, ECC standards applied.

pyproject.toml

@@ -0,0 +1,25 @@
+[project]
+name = "hermes-memory-nextlevel"
+version = "0.1.0"
+description = "Mehrschichtiges Memory-Upgrade für Hermes Agent"
+readme = "README.md"
+requires-python = ">=3.10"
+
+dependencies = [
+    "networkx>=3.3",
+]
+
+[project.optional-dependencies]
+chroma = ["chromadb>=0.5.0"]
+qdrant = ["qdrant-client>=1.9.0"]
+embed = ["sentence-transformers>=3.0.0"]
+all = [
+    "chromadb>=0.5.0",
+    "qdrant-client>=1.9.0",
+    "sentence-transformers>=3.0.0",
+    "networkx>=3.3",
+]
+
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"