Use coins_plm.py as single source of truth for ElectrumX patch

- Remove inline Palladium coin definition from Dockerfile.electrumx
  and COPY coins_plm.py instead, reducing duplication
- Add TX_COUNT/TX_COUNT_HEIGHT/TX_PER_BLOCK to coins_plm.py with
  real chain data (457478 txs at height 382404)
- Update entrypoint.sh to fetch live TX stats from palladiumd at
  container startup, keeping sync estimates accurate automatically

Dockerfile.electrumx

@@ -1,88 +1,29 @@
 FROM lukechilds/electrumx
 
-RUN python3 - <<'PY'
-import pathlib
-p = pathlib.Path('/usr/local/lib/python3.13/dist-packages/electrumx/lib/coins.py')
-s = p.read_text(encoding='utf-8')
+# Copy Palladium coin definition and patch ElectrumX
+COPY electrumx-patch/coins_plm.py /tmp/coins_plm.py
 
-# Define Palladium coin classes directly in coins.py to avoid circular imports
-palladium_classes = '''
+RUN python3 - <<'PATCH'
+import pathlib, re
 
-# Palladium (PLM) - Bitcoin-based cryptocurrency
-class Palladium(Bitcoin):
-    NAME = "Palladium"
-    SHORTNAME = "PLM"
-    NET = "mainnet"
+patch = pathlib.Path('/tmp/coins_plm.py').read_text()
+# Extract only class definitions (skip import lines)
+classes = re.split(r'^(?=class )', patch, flags=re.MULTILINE)
+classes = [c for c in classes if c.strip().startswith('class ')]
+body = '\n' + '\n'.join(classes)
 
-    # Address prefixes (same as Bitcoin mainnet)
-    P2PKH_VERBYTE = bytes([0x00])
-    P2SH_VERBYTE = bytes([0x05])
-    WIF_BYTE = bytes([0x80])
+for target in [
+    '/usr/local/lib/python3.13/dist-packages/electrumx/lib/coins.py',
+    '/electrumx/src/electrumx/lib/coins.py',
+]:
+    p = pathlib.Path(target)
+    if p.exists():
+        s = p.read_text()
+        if 'class Palladium(Bitcoin):' not in s:
+            p.write_text(s + body)
 
-    # Bech32 prefix
-    HRP = "plm"
-
-    # Genesis hash (Bitcoin mainnet)
-    GENESIS_HASH = "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"
-
-    # Clear inherited checkpoints
-    CHECKPOINTS = []
-
-    # Network statistics (required by ElectrumX)
-    TX_COUNT = 1000
-    TX_COUNT_HEIGHT = 1
-    TX_PER_BLOCK = 4
-
-    # Default ports
-    RPC_PORT = 2332
-    PEER_DEFAULT_PORTS = {'t': '2333', 's': '52333'}
-
-    # Deserializer
-    DESERIALIZER = lib_tx.DeserializerSegWit
-
-
-class PalladiumTestnet(Palladium):
-    NAME = "Palladium"
-    SHORTNAME = "tPLM"
-    NET = "testnet"
-
-    # Testnet address prefixes
-    P2PKH_VERBYTE = bytes([0x7f])  # 127 decimal - addresses start with 't'
-    P2SH_VERBYTE = bytes([0x73])   # 115 decimal
-    WIF_BYTE = bytes([0xff])       # 255 decimal
-
-    # Bech32 prefix for testnet
-    HRP = "tplm"
-
-    # Genesis hash (Bitcoin testnet)
-    GENESIS_HASH = "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"
-
-    # Network statistics (required by ElectrumX)
-    TX_COUNT = 500
-    TX_COUNT_HEIGHT = 1
-    TX_PER_BLOCK = 2
-
-    # Testnet ports
-    RPC_PORT = 12332
-    PEER_DEFAULT_PORTS = {'t': '12333', 's': '62333'}
-'''
-
-# Add Palladium classes if not already present
-if 'class Palladium(Bitcoin):' not in s:
-    s += palladium_classes
-
-p.write_text(s, encoding='utf-8')
-
-# Also patch the source file used by the container
-p_src = pathlib.Path('/electrumx/src/electrumx/lib/coins.py')
-if p_src.exists():
-    s_src = p_src.read_text(encoding='utf-8')
-    if 'class Palladium(Bitcoin):' not in s_src:
-        s_src += palladium_classes
-    p_src.write_text(s_src, encoding='utf-8')
-
-print('>> Patched ElectrumX with Palladium and PalladiumTestnet coins')
-PY
+print('>> Patched ElectrumX with Palladium coin classes')
+PATCH
 
 RUN mkdir -p /certs && \
     cat >/certs/openssl.cnf <<'EOF' && \