Docs/pruner service documentation (#257)

Author: torrejonv

docs/howto/locallyRunningServices.md

@@ -176,6 +176,7 @@ Enable or disable components by setting the corresponding option to `1` or `0`.
 | Legacy             | `-legacy=1`                 | Legacy API support                    |
 | P2P                | `-p2p=1`                    | Peer-to-peer networking service       |
 | Propagation        | `-propagation=1`            | Data propagation service              |
+| Pruner             | `-pruner=1`                 | UTXO data pruning service             |
 | RPC                | `-rpc=1`                    | RPC interface service                 |
 | Subtree Validation | `-subtreevalidation=1`      | Subtree validation service            |
 | UTXO Persister     | `-utxopersister=1`          | UTXO persistence service              |

docs/references/projectStructure.md

@@ -45,6 +45,7 @@ teranode/
 │   ├── legacy/                   # Legacy services
 │   ├── p2p/                      # Peer-to-peer networking service
 │   ├── propagation/              # Transaction propagation service
+│   ├── pruner/                   # Pruner service
 │   ├── rpc/                      # RPC service
 │   ├── subtreevalidation/        # Subtree validation service
 │   ├── utxopersister/            # UTXO persister service

docs/references/services/blockassembly_reference.md

@@ -86,7 +86,7 @@ type BlockAssembler struct {
     stateChangeCh chan BestBlockInfo
 
     // lastPersistedHeight tracks the last block height processed by block persister
-    // This is updated via BlockPersisted notifications and used to coordinate with cleanup
+    // This is updated via BlockPersisted notifications
     lastPersistedHeight atomic.Uint32
 
     // currentChainMap maps block hashes to their heights
@@ -110,20 +110,9 @@ type BlockAssembler struct {
     // currentRunningState tracks the current operational state
     currentRunningState atomic.Value
 
-    // cleanupService manages background cleanup tasks
-    cleanupService cleanup.Service
-
-    // cleanupServiceLoaded indicates if the cleanup service has been loaded
-    cleanupServiceLoaded atomic.Bool
-
-    // cleanupQueueCh queues cleanup operations (parent preserve + DAH cleanup) to prevent flooding during catchup
-    cleanupQueueCh chan uint32
-
-    // cleanupQueueWorkerStarted tracks if the cleanup queue worker is running
-    cleanupQueueWorkerStarted atomic.Bool
-
-    // unminedCleanupTicker manages periodic cleanup of old unmined transactions
-    unminedCleanupTicker *time.Ticker
+    // Note: Cleanup-related fields (cleanupService, cleanupQueueCh, unminedCleanupTicker)
+    // were removed in PR #114 when UTXO pruning was extracted to the standalone Pruner service.
+    // See: docs/topics/services/pruner.md
 
     // cachedCandidate stores the cached mining candidate
     cachedCandidate *CachedMiningCandidate