### Problem Description

```
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "org.elasticsearch.xpack.esql.planner.Layout.getChannel(org.elasticsearch.xpack.ql.expression.NameId)" is null
        at org.elasticsearch.xpack.esql.planner.LocalExecutionPlanner.planProject(LocalExecutionPlanner.java:521)
        at org.elasticsearch.xpack.esql.planner.LocalExecutionPlanner.plan(LocalExecutionPlanner.java:174)
        at org.elasticsearch.xpack.esql.planner.LocalExecutionPlanner.planExchangeSink(LocalExecutionPlanner.java:304)
        at org.elasticsearch.xpack.esql.planner.LocalExecutionPlanner.plan(LocalExecutionPlanner.java:202)
        at org.elasticsearch.xpack.esql.planner.LocalExecutionPlanner.plan(LocalExecutionPlanner.java:149)
        at org.elasticsearch.xpack.esql.plugin.ComputeService.runCompute(ComputeService.java:252)
        at org.elasticsearch.xpack.esql.plugin.ComputeService$DataNodeRequestHandler.lambda$messageReceived$5(ComputeService.java:422)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.action.ActionListener$2.onResponse(ActionListener.java:177)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.action.ActionListener.completeWith(ActionListener.java:305)
        at org.elasticsearch.xpack.esql.plugin.ComputeService.lambda$acquireSearchContexts$13(ComputeService.java:291)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.index.shard.IndexShard.ensureShardSearchActive(IndexShard.java:3926)
        at org.elasticsearch.xpack.esql.plugin.ComputeService.acquireSearchContexts(ComputeService.java:289)
        at org.elasticsearch.xpack.esql.plugin.ComputeService$DataNodeRequestHandler.messageReceived(ComputeService.java:420)
        at org.elasticsearch.xpack.esql.plugin.ComputeService$DataNodeRequestHandler.messageReceived(ComputeService.java:412)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:75)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.transport.TransportService$6.doRun(TransportService.java:1019)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:33)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:983)
        at org.elasticsearch.server@8.11.0-SNAPSHOT/org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
        at java.base/java.lang.Thread.run(Thread.java:1623)
```

### Steps to Reproduce

A very specific query (all commands must be used in that specific order) generates this NPE

```
from employees | limit 10 | rename first_name as somethingElse | stats var0 = avg(salary)
```

### Logs (if relevant)

_No response_
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/PhysicalPlanOptimizerTests.java
var source = source(extract.child());
        
        assertThat(source.estimatedRowSize(), equalTo(allFieldRowSize + Integer.BYTES * 2 + Long.BYTES));
    }
    /**
     * Expects the filter to transform the source into a local relationship
     * LimitExec[10000[INTEGER]]
     * \_ExchangeExec[[],false]
     *   \_LocalSourceExec[[_meta_field{f}#8, emp_no{r}#2, first_name{f}#3, gender{f}#4, languages{f}#5, last_name{f}#6, salary{f}#7],EMPT
     * Y]
     */
    public void testLocallyMissingField() {
        var testStats = statsForMissingField("emp_no");
        var optimized = optimizedPlan(physicalPlan("""
              from test
            | where emp_no > 10
            """), testStats);
        var limit = as(optimized, LimitExec.class);
        var exchange = as(limit.child(), ExchangeExec.class);
        var source = as(exchange.child(), LocalSourceExec.class);
        assertEquals(LocalSupplier.EMPTY, source.supplier());
    }
    /**
     * GrokExec[first_name{f}#4,Parser[pattern=%{WORD:b}.*, grok=org.elasticsearch.grok.Grok@60a20ab6],[b{r}#2]]
     * \_LimitExec[10000[INTEGER]]
     *   \_ExchangeExec[]
     *     \_ProjectExec[[_meta_field{f}#9, emp_no{f}#3, first_name{f}#4, gender{f}#5, languages{f}#6, last_name{f}#7, salary{f}#8]]
     *       \_FieldExtractExec[_meta_field{f}#9, emp_no{f}#3, first_name{f}#4, gen..]
     *         \_EsQueryExec[test], query[][_doc{f}#10], limit[10000], sort[] estimatedRowSize[216]
     */