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/wallet/asyncrpcoperation_saplingconsolidation.cpp

@@ -19,7 +19,6 @@
 
 CAmount fConsolidationTxFee = DEFAULT_CONSOLIDATION_FEE;
 bool fConsolidationMapUsed = false;
-const int CONSOLIDATION_EXPIRY_DELTA = 15;
 
 extern string randomSietchZaddr();
 
@@ -118,7 +117,7 @@ bool AsyncRPCOperation_saplingconsolidation::main_impl() {
     // the NU-straddle guard agree with the height the tx is signed for. Mirrors
     // the autoshield op (commit 65130c312).
     auto nextActivationHeight = NextActivationHeight(tipHeight, consensusParams);
-    if (nextActivationHeight && tipHeight + CONSOLIDATION_EXPIRY_DELTA >= nextActivationHeight.get()) {
+    if (nextActivationHeight && tipHeight + AUTO_OP_EXPIRY_DELTA >= nextActivationHeight.get()) {
         LogPrintf("%s: Consolidation txs would be created before a NU activation but may expire after. Skipping this round.\n",opid);
         setConsolidationResult(0, 0, std::vector<std::string>());
         return status;
@@ -200,7 +199,7 @@ bool AsyncRPCOperation_saplingconsolidation::main_impl() {
               continue;
 
             auto builder = TransactionBuilder(consensusParams, tipHeight, pwalletMain);
-            builder.SetExpiryHeight(tipHeight + CONSOLIDATION_EXPIRY_DELTA);
+            builder.SetExpiryHeight(tipHeight + AUTO_OP_EXPIRY_DELTA);
             auto actualAmountToSend = amountToSend < fConsolidationTxFee ? 0 : amountToSend - fConsolidationTxFee;
             LogPrintf("%s: %s Beginning to create transaction with Sapling output amount=%s\n", __func__, opid, FormatMoney(actualAmountToSend));