Remove notify watch, use local socket IPC for changes feed

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Build and Test Commands
+- Build: `cargo make debug` (debug) or `cargo make release` (optimized)
+- Format: `cargo make format` or check with `cargo make format-check`
+- Lint: `cargo make clippy`
+- Test: `cargo make test` (standard) or `cargo make test-all` (all backends)
+- Unit tests only: `cargo make unit`
+- Single test: `cargo nextest run -p sos-integration-tests test_name` 
+- CLI tests: `cargo make test-cli` or `cargo make test-shell`
+- Documentation: `cargo make doc`
+
+## Code Style
+- Use the Rust 2018 edition style
+- Maximum line width: 78 characters
+- Prefer `thiserror` for error handling with clear, specific error types
+- Use doc comments (`///`) for public APIs
+- Add `#![deny(missing_docs)]` and `#![forbid(unsafe_code)]` to crate roots
+- Prefer `Result<T, Error>` with custom error types for error handling
+- Implement informative Display/Debug traits for public types
+- Use bitflags for flag-based enums
+- Ensure proper serialization/deserialization for custom types
+
+## Naming and Structure
+- Use snake_case for variables, functions, and modules
+- Use PascalCase for types and traits
+- Group related functionality in modules
+- Re-export important types in crate root
+- Use clear, descriptive names that reflect domain concepts
+- Follow vault, folder, secret terminology as defined in documentation