[pull] main from temporalio:main - #42

## Related issues

N/A

## What changed?

Restores the `server start-dev` log-level default exception in `temporal
options`, which is now the canonical help surface for global flags. Also
corrects the adjacent stale implementation comment and adds regression
coverage.

This preserves the contract from #956: it changed the common default
from `info` to `never` for short-lived CLI commands, while deliberately
retaining the long-running `server start-dev` default of `warn`. That
exception was present in #956’s option metadata but was removed by the
subsequent help decluttering change.

## Checklist

- [x] Added applicable unit-test coverage
- [x] Help text describes the actual command behavior

## Manual tests

```
temporal options
# --log-level describes the `never` default and the `server start-dev` `warn` exception.
```

## Validation

```
env GOCACHE=/private/tmp/fix-cli-log-desc-gocache make test
```

## Related issues

n/a

## What changed?

This adds support for new AWS compute provider: AWS AgentCore. AgentCore
configuration is almost identitical to AWS Lambda, replacing function
ARN with Runtime Endpoint ARN.

## Checklist

<!-- Your PR should satisfy all these requirements. However, feel free
to remove items that don't apply to the PR. Consider giving this
checklist to an AI agent before opening your PR. -->

**Stability**
- [x] Breaking changes are marked with 💥 in the PR title and release
notes
- [x] Changes to JSON output (`-o json` / `-o jsonl`) are treated as
breaking changes

**Design**
- [✅] This feature does not depend on Cloud-only APIs or behavior (it
works against an OSS server)
- [✅] New commands follow `temporal <noun> <verb>` structure (e.g.
`temporal workflow start`)
- [✅] New flags are named after the API concept, not the implementation
mechanism (good: `--search-attribute`, bad: `--index-field`)
- [ ❌] New flags don't duplicate an existing flag that serves the same
purpose
- > Both lambda and agentcore utilize similar assume-role-external-id,
assume-role-arn and the corresponding skip flag. However, we are scoping
them to the compute provider in an effort to support multiple compute
providers in the future, as WCI currently supports that, but we haven't
exposed it yet.
- [✅] New flags do not have short aliases without strong justification
- [✅] Experimental features are marked with `(Experimental)` in
`commands.yaml`

**Help text** (see style guide at the top of `commands.yaml`)
- [✅] All flags shown in help text and examples are implemented and
functional
- [ ✅] Summaries use sentence case and have no trailing period
- [ ✅] Long descriptions end with a period and include at least one
example invocation
- [ ✅] Examples use long flags (`--namespace`, not `-n`), one flag per
line
- [ ✅] Placeholder values use `YourXxx` form (`YourWorkflowId`,
`YourNamespace`)

**Behavior**
- [ ✅] Results go to stdout; errors and warnings go to stderr
- [ ✅] Error messages are lowercase with no trailing punctuation

**Tests**
- [✅] Added functional test(s) (`SharedServerSuite`)
- [✅] Added unit test(s) (`func TestXxx`) where applicable

## Manual tests

<!-- Edit the code samples below to provide setup and happy-path and
error-path testing instructions. -->

### setup
```
<jschoeff> eval `assume-sso team-compute-sandbox/AWSAdministratorAccess`
[i] If the browser does not open automatically, please open this link: https://temporal.awsapps.com/start/#/device?user_code=LLXQ-NPJW
[i] Awaiting AWS authentication in the browser
[i] You will be prompted to authenticate with AWS in the browser, then you will be prompted to 'Allow'
[i] Code: LLXQ-NPJW
[✔] Successfully logged into Start URL: https://temporal.awsapps.com/start


<jschoeff>   go build -o temporal ./cmd/temporal  
  ./temporal server start-dev \
    --dynamic-config-value workercontroller.enabled=true
Temporal CLI 0.0.0-DEV (Server 1.32.0-162.0, UI 2.53.1)
```

### Happy Path
```
<jschoeff> ./temporal worker deployment create --name temporal-worker-agentcore
Successfully created worker deployment

<jschoeff> ./temporal worker deployment create-version  \
      --aws-agentcore-endpoint-arn arn:aws:bedrock-agentcore:us-east-1:093235337669:runtime/justinschoeff_temporal_worker_agentcore-DvGerTB5L8/runtime-endpoint/V5 \
      --aws-agentcore-assume-role-external-id schoeffExternalId \
      --aws-agentcore-role arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --build-id v5 \
      --deployment-name temporal-worker-agentcore
Successfully created worker deployment version

<jschoeff> ./temporal worker deployment set-current-version --deployment-name temporal-worker-agentcore --build-id v5
Worker Deployment Before Update:
  Name                          temporal-worker-agentcore
  CreateTime                    12 minutes ago
  CurrentVersionDeploymentName  temporal-worker-agentcore
  CurrentVersionBuildID         v5
  CurrentVersionChangedTime     11 minutes ago

Version Summaries:
       DeploymentName        BuildID  DrainageStatus    CreateTime
  temporal-worker-agentcore  v5       unspecified     12 minutes ago
Continue with set Current? y/N y
Successfully set the current worker deployment version


<jschoeff> ./temporal workflow start \               
--type sampleWorkflow \
--task-queue server-scaled-workers \
--input '"What can you do?"'
Running execution:
  WorkflowId  7f7e99b7-d645-42a3-8ca2-d713d1caafb1
  RunId       01a035d6-4cb9-73e0-b242-397ba3259475
  Type        sampleWorkflow
  Namespace   default
  TaskQueue   server-scaled-workers

<jschoeff> ./temporal workflow describe --workflow-id 7f7e99b7-d645-42a3-8ca2-d713d1caafb1                   
Execution Info:
  WorkflowId            7f7e99b7-d645-42a3-8ca2-d713d1caafb1
  RunId                 01a035d6-4cb9-73e0-b242-397ba3259475
  Type                  sampleWorkflow
  Namespace             default
  TaskQueue             server-scaled-workers
...
Versioning Info:

  Behavior        Pinned
  DeploymentName  temporal-worker-agentcore
  BuildId         v5

Results:
  RunTime         4.27s
  Status          COMPLETED
  Result          "go: Hello What can you do?"
  ResultEncoding  json/plain

```

**Error case**
```
<jschoeff> ./temporal worker deployment create-version  \  
      --aws-agentcore-endpoint-arn arn:aws:bedrock-agentcore:us-east-1:093235337669:runtime/justinschoeff_temporal_worker_agentcore-DvGerTB5L8/runtime-endpoint/V5 \
      --aws-agentcore-assume-role-external-id schoeffExternalId \

Error: required flag(s) "build-id", "deployment-name" not set
Usage:
...
Error: required flag(s) "build-id", "deployment-name" not set

```

```
<jschoeff> ./temporal worker deployment create-version  \     
      --aws-agentcore-assume-role-external-id schoeffExternalId \
      --aws-agentcore-assume-role-arn arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --build-id v5 \
      --deployment-name temporal-worker-agentcore
Error: missing configuration for compute provider

```
```
<jschoeff> ./temporal worker deployment create-version  \         
      --aws-agentcore-endpoint-arn arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --aws-agentcore-assume-role-arn arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --build-id v5 \
      --deployment-name temporal-worker-agentcore
Error: missing required AWS Agentcore provider detail: role_external_id

```
```
<jschoeff> ./temporal worker deployment create-version  \                                                                                                           ~/workplace/local-dev/cli
      --aws-agentcore-endpoint-arn arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --aws-agentcore-assume-role-external-id arn:aws:iam::093235337669:role/justinschoeff-temporal-worker-invoke \
      --build-id v5 \
      --deployment-name temporal-worker-agentcore
Error: missing required AWS Agentcore provider detail: role

```