[AppService] az webapp status: Add new command to show per-instance Site Runtime Status

[HaripriyaMehta]

Related command

az webapp status

Description

Adds a new az webapp status command that surfaces the per-instance Site Runtime Status
for a web app by calling the siteStatus ARM API. Supports:

• --slot to target a deployment slot
• --instance to filter to a single instance (run az webapp list-instances to discover IDs)

Output is rendered as a table via a transformer, with error columns shown only when an
instance reports a lastError.

Screenshots of Output:

Testing

• Added WebappStatusScenarioTest (recorded scenario test, NODE|22-lts Linux app).
• Added TestWebappStatusMocked with 5 mocked unit tests covering slot/instance URL
  construction, output formatting, and the missing-instance error path.
• azdev style appservice → PASSED (pylint + flake8)
• azdev linter --include-whl-extensions appservice → No violations found
• azdev test test_webapp_status TestWebappStatusMocked → 6 passed

History Notes

[AppService] az webapp status: Add new command to show per-instance Site Runtime Status

[azure-client-tools-bot-prd]

Validation for Azure CLI Full Test Starting...

Thanks for your contribution!

[azure-client-tools-bot-prd]

Hi @HaripriyaMehta,
Since the current milestone time is less than 7 days, this pr will be reviewed in the next milestone.

[azure-client-tools-bot-prd]

Validation for Breaking Change Starting...

Thanks for your contribution!

[yonzhan]

AppService

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[Shi1810]

This needs to be reverted and it is auto generated.