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

pezkuwi/xcm/src/v3/multilocation.rs

@@ -397,7 +397,7 @@ impl MultiLocation {
 		target: &MultiLocation,
 		context: InteriorMultiLocation,
 	) -> Result<(), ()> {
-		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/149 Optimize this.
+		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/292 Optimize this.
 
 		// 1. Use our `context` to figure out how the `target` would address us.
 		let inverted_target = context.invert_target(target)?;

pezkuwi/xcm/src/v4/location.rs

@@ -448,7 +448,7 @@ impl Reanchorable for Location {
 	///
 	/// Does not modify `self` in case of overflow.
 	fn reanchor(&mut self, target: &Location, context: &InteriorLocation) -> Result<(), ()> {
-		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/149 Optimize this.
+		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/292 Optimize this.
 
 		// 1. Use our `context` to figure out how the `target` would address us.
 		let inverted_target = context.invert_target(target)?;

pezkuwi/xcm/src/v5/location.rs

@@ -448,7 +448,7 @@ impl Reanchorable for Location {
 	///
 	/// Does not modify `self` in case of overflow.
 	fn reanchor(&mut self, target: &Location, context: &InteriorLocation) -> Result<(), ()> {
-		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/149 Optimize this.
+		// TODO: https://github.com/pezkuwichain/pezkuwi-sdk/issues/292 Optimize this.
 
 		// 1. Use our `context` to figure out how the `target` would address us.
 		let inverted_target = context.invert_target(target)?;

pezkuwi/xcm/src/v5/traits.rs

@@ -172,7 +172,7 @@ pub enum Error {
 	/// The weight of an XCM message is not computable ahead of execution.
 	WeightNotComputable,
 	/// Recursion stack limit reached
-	// TODO(https://github.com/pezkuwichain/pezkuwi-sdk/issues/148): This should have a fixed index since
+	// TODO(https://github.com/pezkuwichain/pezkuwi-sdk/issues/291): This should have a fixed index since
 	// we use it in `FrameTransactionalProcessor` // which is used in instructions.
 	// Or we should create a different error for that.
 	ExceedsStackLimit,