refactor: convert guru-rmm to git submodule (gururmm Gitea repo)

Removes the stale copy of gururmm source from claudetools tracking and
replaces it with a submodule pointing to the live gururmm Gitea repo.
Fixes context drift between session logs and actual codebase state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

projects/msp-tools/guru-rmm/server/Cargo.toml

@@ -1,76 +0,0 @@
-[package]
-name = "gururmm-server"
-version = "0.2.0"
-edition = "2021"
-description = "GuruRMM Server - RMM management server"
-authors = ["GuruRMM"]
-
-[dependencies]
-# Web framework
-axum = { version = "0.7", features = ["ws", "macros"] }
-axum-extra = { version = "0.9", features = ["typed-header"] }
-tower = { version = "0.5", features = ["util", "timeout"] }
-tower-http = { version = "0.6", features = ["cors", "trace", "compression-gzip"] }
-http = "1"
-
-# Async runtime
-tokio = { version = "1", features = ["full"] }
-
-# Database
-sqlx = { version = "0.8", features = [
-    "runtime-tokio",
-    "tls-native-tls",
-    "postgres",
-    "uuid",
-    "chrono",
-    "migrate"
-] }
-
-# Serialization
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-
-# Configuration
-config = "0.14"
-
-# Authentication
-jsonwebtoken = "9"
-argon2 = "0.5"
-
-# UUID
-uuid = { version = "1", features = ["v4", "serde"] }
-
-# Time
-chrono = { version = "0.4", features = ["serde"] }
-
-# Logging
-tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-
-# Error handling
-anyhow = "1"
-thiserror = "1"
-
-# Random for API key generation
-rand = "0.8"
-base64 = "0.22"
-
-# Hashing for API keys
-sha2 = "0.10"
-
-# Semantic versioning for agent updates
-semver = "1"
-
-# Environment variables
-dotenvy = "0.15"
-
-# Futures for WebSocket
-futures-util = "0.3"
-
-# Pin transitive dependencies to stable versions
-home = "0.5.9"  # 0.5.12 requires Rust 1.88
-
-[profile.release]
-opt-level = 3
-lto = true
-codegen-units = 1