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

pezcumulus/client/consensus/aura/src/collators/basic.rs

@@ -224,7 +224,7 @@ where
 			// produce multiple blocks per slot which very likely would fail on chain. Thus, we have
 			// this "hack" to only produce one block per slot per relay chain fork.
 			//
-			// With https://github.com/pezkuwichain/pezkuwi-sdk/issues/127 this implementation will be
+			// With https://github.com/pezkuwichain/pezkuwi-sdk/issues/272 this implementation will be
 			// obsolete and also the underlying issue will be fixed.
 			if last_processed_slot >= *claim.slot()
 				&& last_relay_chain_block < *relay_parent_header.number()

pezcumulus/client/consensus/aura/src/collators/lookahead.rs

@@ -102,7 +102,7 @@ pub struct Params<BI, CIDP, Client, Backend, RClient, CHP, Proposer, CS> {
 	/// Whether we should reinitialize the collator config (i.e. we are transitioning to aura).
 	pub reinitialize: bool,
 	/// The maximum percentage of the maximum PoV size that the collator can use.
-	/// It will be removed once <https://github.com/pezkuwichain/pezkuwi-sdk/issues/23> is fixed.
+	/// It will be removed once <https://github.com/pezkuwichain/pezkuwi-sdk/issues/193> is fixed.
 	pub max_pov_percentage: Option<u32>,
 }
 
@@ -429,7 +429,7 @@ where
 				} else {
 					// Set the block limit to 85% of the maximum PoV size.
 					//
-					// Once https://github.com/pezkuwichain/pezkuwi-sdk/issues/23 issue is
+					// Once https://github.com/pezkuwichain/pezkuwi-sdk/issues/193 issue is
 					// fixed, the reservation should be removed.
 					validation_data.max_pov_size * 85 / 100
 				} as usize;

pezcumulus/client/consensus/aura/src/collators/slot_based/block_builder_task.rs

@@ -108,7 +108,7 @@ pub struct BuilderTaskParams<
 	/// wait for relay chain notifications because we woke up too early).
 	pub slot_offset: Duration,
 	/// The maximum percentage of the maximum PoV size that the collator can use.
-	/// It will be removed once https://github.com/pezkuwichain/pezkuwi-sdk/issues/23 is fixed.
+	/// It will be removed once https://github.com/pezkuwichain/pezkuwi-sdk/issues/193 is fixed.
 	pub max_pov_percentage: Option<u32>,
 }
 
@@ -399,7 +399,7 @@ where
 			} else {
 				// Set the block limit to 85% of the maximum PoV size.
 				//
-				// Once https://github.com/pezkuwichain/pezkuwi-sdk/issues/23 issue is
+				// Once https://github.com/pezkuwichain/pezkuwi-sdk/issues/193 issue is
 				// fixed, this should be removed.
 				validation_data.max_pov_size * 85 / 100
 			} as usize;

pezcumulus/client/consensus/aura/src/collators/slot_based/mod.rs

@@ -147,7 +147,7 @@ pub struct Params<Block, BI, CIDP, Client, Backend, RClient, CHP, Proposer, CS,
 	/// When set, the collator will export every produced `POV` to this folder.
 	pub export_pov: Option<PathBuf>,
 	/// The maximum percentage of the maximum PoV size that the collator can use.
-	/// It will be removed once <https://github.com/pezkuwichain/pezkuwi-sdk/issues/23> is fixed.
+	/// It will be removed once <https://github.com/pezkuwichain/pezkuwi-sdk/issues/193> is fixed.
 	pub max_pov_percentage: Option<u32>,
 }
 

pezcumulus/client/consensus/aura/src/equivocation_import_queue.rs

@@ -264,7 +264,7 @@ fn slot_now(slot_duration: SlotDuration) -> Slot {
 /// The others are generated explicitly internally.
 ///
 /// This should only be used for runtimes where the runtime does not check all inherents and
-/// seals in `execute_block` (see <https://github.com/pezkuwichain/pezkuwi-sdk/issues/91>)
+/// seals in `execute_block` (see <https://github.com/pezkuwichain/pezkuwi-sdk/issues/238>)
 pub fn fully_verifying_import_queue<P, Client, Block: BlockT, I, CIDP>(
 	client: Arc<Client>,
 	block_import: I,