node: bump evm v0.19.0 (Quasar Edition canonical, etnaTimestamp killed) (#132)

* Dockerfile: bump EVM plugin v0.18.18 → v0.19.0 (Quasar Edition)

Quasar Edition rip — one and only one upgrade-key namespace:
 - luxfi/evm v0.19.0 renames EtnaTimestamp → QuasarTimestamp
   (Go field + json tag)
 - Strict json.Decoder DisallowUnknownFields on upgradeBytes parse
   in plugin/evm/vm.go — any stale etnaTimestamp in a deployed
   upgrade.json now fails parse loudly at boot rather than silently
   leaving the fork field nil and disabling activation.

Pairs with: luxfi/genesis kill-etna sweep (configs/*/upgrade.json
and brand L1 EVM genesis.json scrubbed).

* docker-entrypoint: rip etnaTimestamp from embedded C-Chain genesis

With luxfi/evm v0.19.0 strict upgradeBytes decode, the entrypoint's
embedded C-Chain genesis heredoc would parse-fail on etnaTimestamp.
One name. quasarTimestamp.

Dockerfile

@@ -147,7 +147,13 @@ RUN . ./build_env.sh && \
 # post-rename. Older evm tags (e.g. v0.8.40 → node v1.23.4) ship a
 # plugin that os.Getenv()'s the old key, mismatching the host that
 # sets the new key, and C-chain never bootstraps.
-ARG EVM_VERSION=v0.18.18
+#
+# v0.19.0 (Quasar Edition): EtnaTimestamp Go field + json tag renamed
+# to QuasarTimestamp/quasarTimestamp. Strict upgradeBytes decode via
+# json.NewDecoder(...).DisallowUnknownFields() — stale etnaTimestamp
+# in any deployed upgrade.json now fails parse loudly at boot rather
+# than silently disabling the fork.
+ARG EVM_VERSION=v0.19.0
 ARG EVM_VM_ID=mgj786NP7uDwBCcq6YwThhaN8FLyybkCa4zBWTQbNgmK6k9A6
 RUN --mount=type=cache,target=/root/.cache/go-build \
     mkdir -p /luxd/build/plugins && \

docker/docker-entrypoint.sh

@@ -206,7 +206,7 @@ EOF
     "apricotPhase4BlockTimestamp": 0,
     "apricotPhase5BlockTimestamp": 0,
     "durangoBlockTimestamp": 0,
-    "etnaTimestamp": 0,
+    "quasarTimestamp": 0,
     "feeConfig": {
       "gasLimit": 20000000,
       "minBaseFee": 1000000000,