Improve URL building and display S3 upload mode per file

[JR-1991]

This pull request refactors how HTTP requests are constructed for direct upload operations, simplifying the codebase and improving clarity. The most important changes include removing the build_url utility function in favor of directly passing parameters and headers to HTTP requests, and updating progress bar descriptions to clearly indicate singlepart and multipart uploads.

Refactoring HTTP request construction:

• Replaced usage of the build_url utility function with direct parameter and header passing in HTTP requests within both directupload.py and dvuploader.py, which simplifies the code and makes it more readable. [1] [2] [3] [4]

• Updated HTTP client session initialization to include base_url for requests in directupload.py, ensuring requests are correctly scoped to the Dataverse instance. [1] [2]

User experience improvements:

• Enhanced progress bar descriptions to indicate whether a file is being uploaded as singlepart or multipart, providing clearer feedback to users during uploads. [1] [2]

[Copilot]

Pull request overview

This pull request refactors HTTP request construction for Dataverse direct upload operations by eliminating the build_url utility function in favor of explicit parameter and header passing. The changes improve code readability and move API token authentication from query parameters to headers (a security best practice). Additionally, user experience is enhanced with progress bar descriptions that distinguish between singlepart and multipart S3 uploads.

Key changes:

• Replaced build_url() calls with direct params and headers arguments in httpx requests
• Added base_url parameter to httpx session initialization for proper scoping to Dataverse instances
• Enhanced progress bars to display upload mode (Singlepart/Multipart) for each file

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
dvuploader/dvuploader.py	Refactored _has_direct_upload() to use direct parameter/header passing instead of build_url
dvuploader/directupload.py	Removed build_url import, added base_url to session configs, updated progress bar descriptions, and refactored _request_ticket() to use explicit parameters/headers

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[Copilot]

The session is initialized with base_url set to dataverse_url (line 72), so using urljoin(dataverse_url, TICKET_ENDPOINT) creates an absolute URL that bypasses the base_url. This is inconsistent with other functions like check_dataset_lock and _get_dataset_id which use relative URLs.

Consider using just TICKET_ENDPOINT directly:

response = await session.get(
    TICKET_ENDPOINT,
    timeout=None,
    params={
        "size": file_size,
        "persistentId": persistent_id,
    },
    headers={
        "X-Dataverse-key": api_token,
    },
)

Suggested change

	url = urljoin(dataverse_url, TICKET_ENDPOINT)
	response = await session.get(
	url,
	response = await session.get(
	TICKET_ENDPOINT,