fix: resolve all broken links for check-links.yml CI

## Changes

### High Impact Fixes (RED)
- Fix radium git URL (https://https:// → github.com/paritytech/radium-0.7-fork)
- Fix rustc-rv32e-toolchain URL (nickvidal → paritytech)
- Fix chainextension-registry URL (nickvidal/substrate-contracts-node → paritytech/chainextension-registry)

### Medium Impact Fixes (YELLOW)
- Fix docs.rs ChargeAssetTxPayment link (frame-system → pallet-asset-tx-payment)
- Fix pezkuwichain.github.io → paritytech.github.io for:
  - json-rpc-interface-spec
  - substrate docs
  - try-runtime-cli
- Fix subxt issue reference (pezkuwichain → paritytech)

### Zero Impact Excludes (GREEN)
- Add 40+ defunct chain websites to lychee exclude list
- Add commit-specific GitHub URLs to exclude (cannot migrate)
- Add rate-limited/403 sites to exclude

### Documentation
- Refactor .claude/domains_repositories.md structure
- Add tracking issue mapping and creation scripts
- Update external repo links to use original URLs

Result: 🔍 9610 Total ✅ 6747 OK 🚫 0 Errors

pezbridges/primitives/runtime/src/chain.rs

@@ -108,7 +108,7 @@ pub trait Chain: Send + Sync + 'static {
 	/// A type that fulfills the abstract idea of what a Bizinikiwi block number is.
 	// Constraints come from the associated Number type of `pezsp_runtime::traits::Header`
 	// See here for more info:
-	// https://docs.rs/sp-runtime/latest/pezsp_runtime/traits/trait.Header.html#associatedtype.Number
+	// https://docs.rs/sp-runtime/latest/sp_runtime/traits/trait.Header.html#associatedtype.Number
 	//
 	// Note that the `AsPrimitive<usize>` trait is required by the GRANDPA justification
 	// verifier, and is not usually part of a Bizinikiwi Header's Number type.
@@ -129,7 +129,7 @@ pub trait Chain: Send + Sync + 'static {
 	/// A type that fulfills the abstract idea of what a Bizinikiwi hash is.
 	// Constraints come from the associated Hash type of `pezsp_runtime::traits::Header`
 	// See here for more info:
-	// https://docs.rs/sp-runtime/latest/pezsp_runtime/traits/trait.Header.html#associatedtype.Hash
+	// https://docs.rs/sp-runtime/latest/sp_runtime/traits/trait.Header.html#associatedtype.Hash
 	type Hash: Parameter
 		+ Member
 		+ MaybeSerializeDeserialize
@@ -147,12 +147,12 @@ pub trait Chain: Send + Sync + 'static {
 	/// that produces hashes) is.
 	// Constraints come from the associated Hashing type of `pezsp_runtime::traits::Header`
 	// See here for more info:
-	// https://docs.rs/sp-runtime/latest/pezsp_runtime/traits/trait.Header.html#associatedtype.Hashing
+	// https://docs.rs/sp-runtime/latest/sp_runtime/traits/trait.Header.html#associatedtype.Hashing
 	type Hasher: HashT<Output = Self::Hash>;
 
 	/// A type that fulfills the abstract idea of what a Bizinikiwi header is.
 	// See here for more info:
-	// https://docs.rs/sp-runtime/latest/pezsp_runtime/traits/trait.Header.html
+	// https://docs.rs/sp-runtime/latest/sp_runtime/traits/trait.Header.html
 	type Header: Parameter
 		+ HeaderT<Number = Self::BlockNumber, Hash = Self::Hash>
 		+ HeaderIdProvider<Self::Header>