Change character validation in tag key to align with server behavior

[EmmaZhu-MSFT (EmmaZhu)]

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[Sam Persson (SamPersson)]

It seems the failing test is correct: key111==value1 should still result in http status 400

If tag names are regular SQL identifiers, they may be present without escaping; if they contain any special characters, they must be delimited with double quotes (e.g. "TagName" = 'TagValue').

(https://learn.microsoft.com/en-us/rest/api/storageservices/specifying-conditional-headers-for-blob-service-operations#tags-predicate-syntax)

So I guess it needs separate validation for double quote delimited tag keys, and only then allow +-./:=

[Copilot]

Pull request overview

This PR updates Azurite’s blob tag filter condition parsing to accept quoted tag keys with a broader set of characters, aligning the emulator’s behavior with Azure Storage server behavior. It also adds test coverage and a changelog entry for the behavior change.

Changes:

• Allow quoted tag keys to include spaces and specific special characters when parsing tag filter conditions.
• Add tests covering quoted keys with special characters and an additional invalid-key scenario.
• Document the behavior change in ChangeLog.md.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tests/blob/apis/blob.test.ts	Adds tests for quoted tag keys containing special characters and another invalid header case.
src/blob/persistence/QueryInterpreter/QueryParser.ts	Updates tag key validation to permit a wider character set when the key is quoted.
ChangeLog.md	Adds an entry describing the new quoted-key behavior.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.