feat: Rebrand Polkadot/Substrate references to PezkuwiChain

This commit systematically rebrands various references from Parity Technologies'
Polkadot/Substrate ecosystem to PezkuwiChain within the kurdistan-sdk.

Key changes include:
- Updated external repository URLs (zombienet-sdk, parity-db, parity-scale-codec, wasm-instrument) to point to pezkuwichain forks.
- Modified internal documentation and code comments to reflect PezkuwiChain naming and structure.
- Replaced direct references to  with  or specific paths within the  for XCM, Pezkuwi, and other modules.
- Cleaned up deprecated  issue and PR references in various  and  files, particularly in  and  modules.
- Adjusted image and logo URLs in documentation to point to PezkuwiChain assets.
- Removed or rephrased comments related to external Polkadot/Substrate PRs and issues.

This is a significant step towards fully customizing the SDK for the PezkuwiChain ecosystem.

bizinikiwi/client/storage-monitor/src/lib.rs

@@ -0,0 +1,145 @@
+// This file is part of Bizinikiwi.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+use clap::Args;
+use pezsp_core::traits::SpawnEssentialNamed;
+use std::{
+	io,
+	path::{Path, PathBuf},
+	time::Duration,
+};
+
+const LOG_TARGET: &str = "storage-monitor";
+
+/// Result type used in this crate.
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// Error type used in this crate.
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+	#[error("IO Error")]
+	IOError(#[from] io::Error),
+	#[error("Out of storage space: available {0}MiB, required {1}MiB")]
+	StorageOutOfSpace(u64, u64),
+}
+
+/// Parameters used to create the storage monitor.
+#[derive(Default, Debug, Clone, Args)]
+pub struct StorageMonitorParams {
+	/// Required available space on database storage.
+	///
+	/// If available space for DB storage drops below the given threshold, node will
+	/// be gracefully terminated.
+	///
+	/// If `0` is given monitoring will be disabled.
+	#[arg(long = "db-storage-threshold", value_name = "MiB", default_value_t = 1024)]
+	pub threshold: u64,
+
+	/// How often available space is polled.
+	#[arg(long = "db-storage-polling-period", value_name = "SECONDS", default_value_t = 5, value_parser = clap::value_parser!(u32).range(1..))]
+	pub polling_period: u32,
+}
+
+/// Storage monitor service: checks the available space for the filesystem for given path.
+pub struct StorageMonitorService {
+	/// watched path
+	path: PathBuf,
+	/// number of megabytes that shall be free on the filesystem for watched path
+	threshold: u64,
+	/// storage space polling period
+	polling_period: Duration,
+}
+
+impl StorageMonitorService {
+	/// Creates new StorageMonitorService for given client config
+	pub fn try_spawn(
+		parameters: StorageMonitorParams,
+		path: PathBuf,
+		spawner: &impl SpawnEssentialNamed,
+	) -> Result<()> {
+		if parameters.threshold == 0 {
+			log::info!(
+				target: LOG_TARGET,
+				"StorageMonitorService: threshold `0` given, storage monitoring disabled",
+			);
+		} else {
+			log::debug!(
+				target: LOG_TARGET,
+				"Initializing StorageMonitorService for db path: {}",
+				path.display()
+			);
+
+			Self::check_free_space(&path, parameters.threshold)?;
+
+			let storage_monitor_service = StorageMonitorService {
+				path,
+				threshold: parameters.threshold,
+				polling_period: Duration::from_secs(parameters.polling_period.into()),
+			};
+
+			spawner.spawn_essential(
+				"storage-monitor",
+				None,
+				Box::pin(storage_monitor_service.run()),
+			);
+		}
+
+		Ok(())
+	}
+
+	/// Main monitoring loop, intended to be spawned as essential task. Quits if free space drop
+	/// below threshold.
+	async fn run(self) {
+		loop {
+			tokio::time::sleep(self.polling_period).await;
+			if Self::check_free_space(&self.path, self.threshold).is_err() {
+				break;
+			};
+		}
+	}
+
+	/// Returns free space in MiB, or error if statvfs failed.
+	fn free_space(path: &Path) -> Result<u64> {
+		Ok(fs4::available_space(path).map(|s| s / 1024 / 1024)?)
+	}
+
+	/// Checks if the amount of free space for given `path` is above given `threshold` in MiB.
+	/// If it dropped below, error is returned.
+	/// System errors are silently ignored.
+	fn check_free_space(path: &Path, threshold: u64) -> Result<()> {
+		match StorageMonitorService::free_space(path) {
+			Ok(available_space) => {
+				log::trace!(
+					target: LOG_TARGET,
+					"free: {available_space} , threshold: {threshold}.",
+				);
+
+				if available_space < threshold {
+					log::error!(target: LOG_TARGET, "Available space {available_space}MiB for path `{}` dropped below threshold: {threshold}MiB , terminating...", path.display());
+					Err(Error::StorageOutOfSpace(available_space, threshold))
+				} else {
+					Ok(())
+				}
+			},
+			Err(e) => {
+				log::error!(target: LOG_TARGET, "Could not read available space: {e:?}.");
+				Err(e)
+			},
+		}
+	}
+}