hygiene: Phase 5 — correct stale comments + name safe magic numbers

Fifth phase of the code-hygiene remediation, done per-file (18 files) via an
18-agent Workflow with strict guardrails. No consensus or security VALUES
changed (verified: pow/hush_utils/hush_bitcoind/net.h/crypter/stratum have
zero non-comment numeric changes); built clean, self-mined, verifychain=true.

Totals: 57 stale comments corrected, 46 user-facing branding fixes, 6
behavior-preserving named constants, 4 stratum warnings, 77 items deliberately
left (consensus/security values, copyright headers).

- Stale comments -> DragonX: corrected HUSH3/HUSH/Komodo/Equihash/Arrakis
  leftovers that misdescribed the active chain (pow AWT/lwma notes, txdb
  "Equihash solution" -> RandomX, wallet CLTV/overwinter/Sapling@1 notes,
  util datadir provenance, crypter's stale mapSproutSpendingKeys invariant).
  Replaced unprofessional/editorializing comments (profane TODOs, "developers
  are elite") with neutral technical notes, preserving the real design info.
- User-facing branding: dumpwallet header "created by Hush" -> "DragonX";
  RPC help text hushd/hush-cli/hushprivkey/hushaddress/Agama -> dragonx*;
  rebranded provably-dead "HUSH3" symbol-fallback literals to DRAGONX.
- Named constants (same values, non-consensus/non-security): addrman
  peer-selection factors (kChanceFactorGrowth/kChanceScale/deprioritize),
  sietch MIN_ZOUTS, an init notarization-DB cache size.
- Left the security macros (ECC/TFM_TIMING_RESISTANT=420, comment-clarified
  only), the consensus subsidy/commission literals + 128/129 TRANSITION
  (comment only), and copyright headers untouched.
- Added a prominent WARNING that the stratum server is Equihash-era and NOT
  updated for DragonX's RandomX PoW (flagged, not rewritten).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/wallet/wallet.cpp

@@ -578,7 +578,7 @@ void CWallet::ChainTip(const CBlockIndex *pindex,
 }
 
 void CWallet::RunSaplingSweep(int blockHeight) {
-    // Sapling is always active since height=1 of HUSH+HACs
+    // Sapling is always active since height=1 on DragonX
     // if (!NetworkUpgradeActive(blockHeight, Params().GetConsensus(), Consensus::UPGRADE_SAPLING)) {
     //     return;
     // }
@@ -669,7 +669,7 @@ void CWallet::RunSaplingSweep(int blockHeight) {
 }
 
 void CWallet::RunSaplingConsolidation(int blockHeight) {
-    // Sapling is always active on HUSH+HACs
+    // Sapling is always active on DragonX (activated at height=1)
     //if (!NetworkUpgradeActive(blockHeight, Params().GetConsensus(), Consensus::UPGRADE_SAPLING)) {
     //    return;
     //}
@@ -2380,7 +2380,7 @@ isminetype CWallet::IsMine(const CTransaction& tx, uint32_t voutNum)
 
         case TX_SCRIPTHASH:
             scriptID = CScriptID(uint160(vSolutions[0]));
-			//TODO: remove CLTV stuff not relevant to Hush
+			//TODO: evaluate whether this CLTV timelock handling is needed on DragonX
             if (this->GetCScript(scriptID, subscript))
             {
                 // if this is a CLTV, handle it differently
@@ -4580,7 +4580,7 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                     txNew.vin.push_back(CTxIn(coin.first->GetHash(),coin.second,CScript(),
                                               std::numeric_limits<unsigned int>::max()-1));
 
-                // All Hush Arrakis Chains always have overwinter NU and so this option was never used
+                // DragonX always has the Overwinter NU active and so this option was never used
                 // Check mempooltxinputlimit to avoid creating a transaction which the local mempool rejects
                 // const size_t limit = 0; // (size_t)GetArg("-mempooltxinputlimit", 0);
                 //{
@@ -5727,7 +5727,7 @@ SpendingKeyAddResult AddSpendingKeyToWallet::operator()(const libzcash::SaplingE
             if (params.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight == Consensus::NetworkUpgrade::ALWAYS_ACTIVE) {
                 m_wallet->mapSaplingZKeyMetadata[ivk].nCreateTime = nTime;
             } else {
-		// TODO: set a better time for HUSH+HACs
+		// TODO: set a better time for DragonX
                 // 154051200 seconds from epoch is Friday, 26 October 2018 00:00:00 GMT - definitely before Sapling activates
                 m_wallet->mapSaplingZKeyMetadata[ivk].nCreateTime = std::max((int64_t) 154051200, nTime);
             }