Fix operator precedence in Object Explorer context menu when conditions

[Copilot]

Description

Three OE context menu when conditions had a &&/|| precedence bug causing view == objectExplorer to only guard the type regex, not the subType regex — so commands appeared outside the Object Explorer whenever subType matched.

Before (broken):

"when": "view == objectExplorer && viewItem =~ /\\btype=(Database)\\b/ || viewItem =~ /\\bsubType=(Database|DockerContainerDatabase)\\b/"

Parsed as (view == objectExplorer && type check) || (subType check) — subType branch has no view guard.

After (fixed):

"when": "view == objectExplorer && (viewItem =~ /\\btype=(Database)\\b/ || viewItem =~ /\\bsubType=(Database|DockerContainerDatabase)\\b/)"

Affected commands:

• mssql.searchDatabase
• mssql.restoreDatabase
• mssql.flatFileImport

Code Changes Checklist

• New or updated unit tests added
• All existing tests pass (npm run test)
• Code follows contributing guidelines
• Telemetry/logging updated if relevant
• No regressions or UX breakage

Reviewers: Please read our reviewer guidelines

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