webpoda query update to support S/C time

[tech3371]

Change Summary

Overview

I started this change to support query by S/C time that falls within input date range. and keep ERT support still. I am hoping this will support discussion about webpoda update and future path.

File changes

Testing

[Copilot]

Pull request overview

This PR extends the WebPODA raw packet download flow to support selecting spacecraft-date ranges directly (SCT mode) while retaining the prior Earth-received-time-driven behavior (ERT mode), and wires this selection into the CLI.

Changes:

• Added a --query-mode flag to the webpoda CLI command to choose between ert and sct query behavior.
• Updated download_daily_data() to branch behavior based on query_by_ert, deriving the set of spacecraft dates either from ERT packet timestamps or from the requested SCT date range.
• Updated WebPODA-related help text and logging/docstrings to reflect the new query behavior.

Reviewed changes

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

File	Description
imap_data_access/webpoda.py	Adds ERT vs SCT branching for computing daily query dates; adjusts related messaging/docstrings.
imap_data_access/cli.py	Adds --query-mode to the webpoda subcommand and passes it through to the download function; improves command description/help.

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[tmplummer]

This looks good to me. I think we should write a ticket for adding ENA+GLOWS support by supporting instruments that break data up by repoint.

[tech3371]

This looks good to me. I think we should write a ticket for adding ENA+GLOWS support by supporting instruments that break data up by repoint.

Ticket sounds good to me for ENA and GLOWS because I tried to look into adding their support and it is more involved than I was prepared for.