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.
2025-12-14 00:04:10 +03:00
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+State database maintenance. Handles canonicalization and pruning in the database. The input to
+this module is a `ChangeSet` which is basically a list of key-value pairs (trie nodes) that
+were added or deleted during block execution.
+
+# Canonicalization
+Canonicalization window tracks a tree of blocks identified by header hash. The in-memory
+overlay allows to get any node that was inserted in any of the blocks within the window.
+The tree is journaled to the backing database and rebuilt on startup.
+Canonicalization function selects one root from the top of the tree and discards all other roots and
+their subtrees.
+
+# Pruning
+See `RefWindow` for pruning algorithm details. `StateDb` prunes on each canonicalization until pruning
+constraints are satisfied.
+
+License: GPL-3.0-or-later WITH Classpath-exception-2.0