hygiene: Phase 2 — DragonX-authored cleanup (13 findings)

Second phase of the code-hygiene remediation, covering the items the
DragonX team introduced or the rebrand missed. No consensus behavior
changes; validated on a local self-mining node.

Log cruft:
- chainparams: route the startup ">>>>>>>>>>" banner and the port line
  through LogPrintf/LogPrint("net") instead of fprintf(stderr).
- pow: drop the fprintf(stderr) hash-mismatch dump that duplicated the
  LogPrintf copy verbatim.
- miner: gate the RandomXDatasetManager per-alloc/per-VM address dumps and
  MemDiag /proc reads behind LogPrint("randomx"); keep a one-line
  "allocated shared dataset (N GB)" summary at default verbosity.

Named constants (single source of truth in wallet.h):
- DEFAULT_AUTOSHIELD_FEE/INTERVAL, MIN_AUTOSHIELD_INTERVAL,
  DEFAULT_AUTOSHIELD_MIN_UTXOS, AUTOSHIELD_MIN/MAX_FEE for the autoshield
  option parsing and help text (were bare 10000/25/5 literals repeated
  across init.cpp and wallet.h).
- AUTO_OP_TARGET_HEIGHT_OFFSET replaces the three copy-pasted
  `blockHeight + 5` async-op scheduling offsets.
- AUTO_OP_EXPIRY_DELTA replaces the three per-file *_EXPIRY_DELTA=15
  constants (sweep/consolidation/autoshield) with one shared value.
- Move DEFAULT_AUTOSHIELD_FEE out of the op header into wallet.h so it no
  longer collides when both headers are included.

Error surfacing:
- init: report clamped/out-of-range -autoshieldinterval/-autoshieldfee via
  InitWarning() (surfaces to GUI/log) instead of fprintf(stderr).

Rebrand / dead foreign-chain code (approved removals):
- server: drop the HUSH3 special-cases in stop() and HelpExampleCli; the
  cli example now shows "dragonx-cli" instead of "hush-cli".
- getinfo (misc): remove the stale dPoW notarization block (notarized,
  prevMoMheight, notarizedhash, notarizedtxid, notarizedtxid_height,
  HUSHnotarized_height, notarized_confirms) — DragonX is a private chain
  from genesis with no active dPoW. Also fixes the hardcoded "HUSH3" that
  made getinfo query a foreign chain's notarization.
- delete the dead Komodo notary RPCs getera/getdragonjson/
  getnotarysendmany/geterablockheights (getera returned 0;
  getnotarysendmany was marked "this is broke") and their registrations.
- remove the dead ASSETCHAINS_EQUIHASH reporting branches in getinfo and
  getmininginfo — DragonX is RandomX-only.

chainparams: document why the upstream Equihash params and the literal
Bitcoin genesis are retained under RandomX (do not "fix" them).

Deferred: the hdSeedOrigin int->string switch in z_autoshieldstatus
(no shared helper exists to reuse; low value).

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

src/chainparams.cpp

@@ -148,6 +148,12 @@ public:
         nMinerThreads      = 0;
         nMaxTipAge         = 24 * 60 * 60;
         nPruneAfterHeight  = 100000;
+        // NOTE: These Equihash parameters and the literal Bitcoin genesis block below are
+        // inherited from the upstream (Zcash/Komodo) CMainParams and are NOT what DragonX
+        // mines under. DragonX is a RandomX CPU-mining chain whose real PoW and chain
+        // parameters are set for its SMART_CHAIN_SYMBOL at runtime (see hush_utils.h and
+        // chainparams_commandline()). They are retained here for upstream-diff hygiene and
+        // genesis fixity; do not "fix" them to RandomX values.
         const size_t N = 200, K = 9;
         BOOST_STATIC_ASSERT(equihash_parameters_acceptable(N, K));
         nEquihashN = N;
@@ -533,9 +539,7 @@ void hush_setactivation(int32_t height)
 
 void *chainparams_commandline() {
     CChainParams::CCheckpointData checkpointData;
-    //if(fDebug) {
-        fprintf(stderr,"chainparams_commandline called with port=%u\n", ASSETCHAINS_P2PPORT);
-    //}
+    LogPrint("net", "chainparams_commandline called with port=%u\n", ASSETCHAINS_P2PPORT);
     if ( SMART_CHAIN_SYMBOL[0] != 0 )
     {
         // A smart chain inherits vSeeds/vFixedSeeds from the base network params,
@@ -579,7 +583,7 @@ void *chainparams_commandline() {
         pCurrentParams->pchMessageStart[1] = (ASSETCHAINS_MAGIC >> 8) & 0xff;
         pCurrentParams->pchMessageStart[2] = (ASSETCHAINS_MAGIC >> 16) & 0xff;
         pCurrentParams->pchMessageStart[3] = (ASSETCHAINS_MAGIC >> 24) & 0xff;
-        fprintf(stderr,">>>>>>>>>> %s: p2p.%u rpc.%u magic.%08x %u %u coins\n",SMART_CHAIN_SYMBOL,ASSETCHAINS_P2PPORT,ASSETCHAINS_RPCPORT,ASSETCHAINS_MAGIC,ASSETCHAINS_MAGIC,(uint32_t)ASSETCHAINS_SUPPLY);
+        LogPrintf("%s: p2p port %u, rpc port %u, magic %08x, supply %u coins\n",SMART_CHAIN_SYMBOL,ASSETCHAINS_P2PPORT,ASSETCHAINS_RPCPORT,ASSETCHAINS_MAGIC,(uint32_t)ASSETCHAINS_SUPPLY);
 
         pCurrentParams->consensus.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight = ASSETCHAINS_SAPLING;
         pCurrentParams->consensus.vUpgrades[Consensus::UPGRADE_OVERWINTER].nActivationHeight = ASSETCHAINS_OVERWINTER;