Refactor CodeGraph MCP: Streamline executor initialization, enhance autoagents module organization, and improve SurrealDB schema

- Simplified the `CodeGraphExecutor::new` method for cleaner initialization.
- Reorganized module imports in `autoagents/mod.rs` for better readability.
- Updated `tier_plugin.rs` to include necessary imports for prompt selection.
- Refactored `graph_tools.rs` to improve error handling and code clarity in tool execution.
- Introduced a synchronous wrapper for `GraphToolExecutor` in `tool_executor_adapter.rs`.
- Enhanced `ProjectIndexer` to utilize a new `SurrealWriterHandle` for batch processing of nodes, edges, and embeddings.
- Updated SurrealDB schema to unify DeepWiki and CodeGraph, adding new fields and indexes for enhanced functionality.
- Improved error handling and logging throughout the indexing process.

Author: jruokola

Cargo.lock

@@ -33,10 +33,11 @@ notify = { workspace = true }
 
 # SurrealDB support (optional)
 surrealdb = { version = "2.2", optional = true }
+dotenvy = { version = "0.15", optional = true }
 
 [features]
 default = []
-surrealdb = ["dep:surrealdb"]
+surrealdb = ["dep:surrealdb", "dep:dotenvy"]
 
 [dev-dependencies]
 tokio-test = { workspace = true }
@@ -47,3 +48,8 @@ fastrand = "2.0"
 [[bench]]
 name = "simple_traversal_benchmarks"
 harness = false
+
+[[bin]]
+name = "surreal_smoke_test"
+path = "src/bin/surreal_smoke_test.rs"
+required-features = ["surrealdb"]