Initial commit: RAG MCP Server with relationship graph

Features:
- Vector search with Pinecone + Vertex AI embeddings
- Document relationships (link, unlink, related, graph)
- Auto-link with LLM analysis
- Intelligent merge with Gemini

Modular structure:
- clients/: Pinecone, Vertex AI
- tools/: core, relations, stats
- utils/: validation, logging

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,26 @@
+[project]
+name = "rag-mcp"
+version = "1.0.0"
+description = "RAG Memory MCP Server with relationship graph support"
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = [
+    "fastmcp>=0.1.0",
+    "pinecone>=5.0.0",
+    "python-dotenv>=1.0.0",
+    "requests>=2.31.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "ruff>=0.1.0",
+]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W"]
+ignore = ["E501"]