yahcli "HapiClients has no matching stub!" error on an otherwise working config.yml

Using yahcli to do an account info command in yahcli 0.7.9 (and not yahcli 0.5.0) will yield a INVALID_NODE_ACCOUNT error for an otherwise valid configuration. Talking to @tinker-michaelj this is suspected to be a yahcli bug but I do not have any additional details beyond that it may be related to a recent @mhess-swl change?

Not account and payer are redacted but the same number and are otherwise a regular Hedera account.

```
docker run -it -v $(pwd):/launch gcr.io/hedera-registry/yahcli:0.7.9 -p -a 6 -n mainnet accounts info
Log level is WARN
Targeting mainnet, paying with accountNum:

---------------------|----------------------|
Account Id | Keys |
---------------------|----------------------|
2025-08-19 15:13:23.281 INFO 213 InfoSuite - -------------- STARTING Info SUITE --------------
2025-08-19 15:13:23.292 INFO 45 MapPropertySource - Initializing a MapPropertySource from {nodes=35.186.191.247:0.0.4#1,35.199.161.108:0.0.6#3,35.242.233.154:0.0.10#7, default.payer.pemKeyLoc=mainnet/keys/account.pem, default.node=6, default.payer=0.0.}
2025-08-19 15:13:24.020 INFO 75 ConfigProviderBase - Properties file data/config/genesis.properties does not exist and won't be used as configuration source
2025-08-19 15:13:24.021 INFO 75 ConfigProviderBase - Properties file data/config/application.properties does not exist and won't be used as configuration source
java.lang.NullPointerException: HapiClients has no matching stub!
at java.base/java.util.Objects.requireNonNull(Objects.java:259)
at com.hedera.services.bdd.spec.infrastructure.HapiClients.nextStubsFromPool(HapiClients.java:393)
at com.hedera.services.bdd.spec.infrastructure.HapiClients.getFileSvcStub(HapiClients.java:213)
at com.hedera.services.bdd.junit.hedera.utils.GrpcUtils.send(GrpcUtils.java:56)
at com.hedera.services.bdd.junit.hedera.AbstractGrpcNetwork.send(AbstractGrpcNetwork.java:52)
at com.hedera.services.bdd.junit.hedera.HederaNetwork.send(HederaNetwork.java:53)
at com.hedera.services.bdd.spec.fees.FeesAndRatesProvider.downloadWith(FeesAndRatesProvider.java:152)
at com.hedera.services.bdd.spec.fees.FeesAndRatesProvider.lookupDownloadFee(FeesAndRatesProvider.java:139)
at com.hedera.services.bdd.spec.fees.FeesAndRatesProvider.downloadRateSet(FeesAndRatesProvider.java:116)
at com.hedera.services.bdd.spec.fees.FeesAndRatesProvider.init(FeesAndRatesProvider.java:81)
at com.hedera.services.bdd.spec.HapiSpec.tryReinitializingFees(HapiSpec.java:728)
at com.hedera.services.bdd.spec.HapiSpec.init(HapiSpec.java:817)
at com.hedera.services.bdd.spec.HapiSpec.run(HapiSpec.java:643)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at com.hedera.services.bdd.suites.HapiSuite.runSequentialSpecs(HapiSuite.java:273)
at com.hedera.services.bdd.suites.HapiSuite.runSuite(HapiSuite.java:231)
at com.hedera.services.bdd.suites.HapiSuite.runSuiteSync(HapiSuite.java:203)
at com.hedera.services.yahcli.commands.accounts.InfoCommand.call(InfoCommand.java:36)
at com.hedera.services.yahcli.commands.accounts.InfoCommand.call(InfoCommand.java:12)
at picocli.CommandLine.executeUserObject(CommandLine.java:2031)
at picocli.CommandLine.access$1500(CommandLine.java:148)
at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2469)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2461)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2423)
at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2277)
at picocli.CommandLine$RunLast.execute(CommandLine.java:2425)
at picocli.CommandLine.execute(CommandLine.java:2174)
at com.hedera.services.yahcli.Yahcli.main(Yahcli.java:104)
```

cat config.yml:
```
defaultNetwork: mainnet
networks:
mainnet:
defaultNodeAccount: 4
nodes:
- { id: 1, account: 4, ipv4Addr: 35.186.191.247 }
- { id: 3, account: 6, ipv4Addr: 35.199.161.108 }
- { id: 7, account: 10, ipv4Addr: 35.242.233.154 }
```

Same command passes with 0.5.0