Support startFrom on List Blobs

[Andrew Gaul (gaul)]

Service version 2026-02-06 adds a startFrom query parameter to List
Blobs, which begins a listing at a given blob name. Azurite accepts that
version but ignored the parameter, so a client asking to start partway
through was handed the container from the beginning.

Unlike marker, which is a name Azurite has already returned and which it
treats as exclusive, startFrom names any blob and includes it. The two
compose rather than conflict: paging a listing that began at startFrom
carries a marker past it, so both filters can apply and neither has to
exclude the other.

Both metadata stores learn the parameter, and the handlers read it off
the request rather than the generated operation parameters, since the
swagger this repository generates from predates it.

The tests drive the parameter by rewriting the query of a
SAS-authenticated request, the same way the include= tests do, because
the JavaScript SDK this repository depends on has no startFrom yet. A
blob name is arbitrary text, so the value is encoded as a client would
have to encode it, and one of the names carries an ampersand: unencoded
it would end the parameter early and leave a startFrom that admits a blob
too many.

The hierarchical listing takes the parameter too, so it is covered as
well. A delimiter squashes blobs into prefixes after startFrom has
selected them, so a prefix survives exactly while one of its blobs does.

[Copilot]

Pull request overview

Adds support for the startFrom query parameter (introduced in Blob service version 2026-02-06) to container blob listing so clients can begin listings at an arbitrary blob name (inclusive), composing correctly with marker (exclusive).

Changes:

• Accepts API version 2026-02-06 and plumbs startFrom from the raw request query into list-blobs handlers.
• Implements startFrom filtering in both Loki and SQL blob metadata stores, composing with existing marker and prefix filtering.
• Adds a test that exercises startFrom for flat listings by rewriting the request query on the wire.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/blob/apis/container.test.ts	Adds a new integration test for startFrom with listBlobsFlat via query rewriting.
src/blob/utils/constants.ts	Adds 2026-02-06 to the accepted Blob service API versions.
src/blob/persistence/SqlBlobMetadataStore.ts	Adds inclusive startFrom filtering using Op.gte, composing with marker and prefix.
src/blob/persistence/LokiBlobMetadataStore.ts	Adds inclusive startFrom filtering in the Loki query chain, composing with marker.
src/blob/persistence/IBlobMetadataStore.ts	Extends listBlobs interface to include an optional startFrom parameter.
src/blob/handlers/ContainerHandler.ts	Passes startFrom from the request query into both flat and hierarchical list-blobs flows.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

[Akanksha Jain (jainakanksha-msft)]

Copilot, please update changelist file and readme with supported feature list

[Akanksha Jain (jainakanksha-msft)]

Andrew Gaul (@gaul), could you please update changelist and readme accordingly for all of your PRs.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.

[Andrew Gaul (gaul)]

Andrew Gaul (Andrew Gaul (@gaul)), could you please update changelist and readme accordingly for all of your PRs.

Done. This is the more meaningful PR for S3Proxy users if you can prioritize it over the other two for the 3.37.0 release.