Exposed the Date header on the outline api so clients can accurately compute times relative to the dates returned by the API; this was previously done with the course API (#26979)

Browser time is notoriously unreliable for this, especially for a Learner-facing countdown call-to-action based on the access expiration date. (REV-2126)

Using the Date header for this allows the client to make use of information that is already sent, does not require additional calls nor modifying the API, and could be generalized to more or all our APIs without modifying them.

Removed unused imports from openedx/core/djangoapps/{api_admin, catalog, ccxcon, certificates}

Co-authored-by: Muhammad Soban Javed <58461728+iamsobanjaved@users.noreply.github.com>

Ran pyupgrade on openedx/core/djangoapps/{system_wide_roles, theming}

ran pyupgrade on openedx/core/djangoapps/{schedules, self_paced, service_status}

xblock information was not being translated correctly when using the blockstore runtime. This makes the i18n_service block-specific so it can look for additional i18n files that can be installed with the XBlock

Adds a command to create an API connection to credentials for testing
program certificates on devstack. This command is not meant to be ran
manually, and will be included in a provisioning type script that will
be added later.

Waffle flags are useful for gradual rollout but that's not possible this
high in the middleware because a lot of the data needed (request.user)
to partition incoming requests is not availabale this high in the
middleware.

Convert this to a WaffleSwitch which will be safer to operate.

Also increase the number of frames in the stack to print per change.
Printing just 1 did not provide enough info because DRF requests wrap
WSGI requests and have a setter proxy.  It will be useful to figure out
how they do this in case it's better that what we're doing in the safe
sessions middleware.

Ticket: https://openedx.atlassian.net/browse/ARCHBOM-1718

The new WaffleFlag.is_enabled check in middleware increased query counts
for multiple tests.

The change is behind a WafleFlag and can be turned on to log every time
the `user` attribute of an instrumented request changes.  This will
significantly increase log volume so it shouldn't be left on all the
time but can be turned on to quickly debug issues related to sessions.

Ticket: https://openedx.atlassian.net/browse/ARCHBOM-1718

* Added batch_get_or_create_user_ids method for ExternalId Model

Update doc string

* Update docstring & fix bug on test

[BD-24] [BB-2726] [TNL-7330] 

For some SAML providers, learners are redirected to MFE and breaking
the flow. Check for running pipeline and if the provider is a SAML
provider keep them on FE.

VAN-425

Currently the registration endpoint has no rate limit. Added a new ratelimit
variable to support the change, it's value is set to 60/7d.

VAN-302

If edxloggedin cookie is not present but the user is authenticated;
user is redirected to authn MFE and then back to dashboard instead
of the desired redirect URL (e.g. finish_auth) resulting in learners
not enrolling into the courses.

VAN-415

We were attempting to add course overrides twice to objects returned in
the toggle state report view. This was causing a TypeError (and thus a
500 error) because the second time, we were attempting to add entries to
an incorrect object.

This issue was not caught by unit tests because we were not testing the
view with WaffleFlagCourseOverride objects. This commit adds a unit test
to prevent future errors.

This is another fix for PR #27108.

This commit adjusts a few values in our discussions configuration APIs to make them match what the frontend needs, as well as to more accurately reflect the providers available today.

- The `active` provider ID is expressed as None if it doesn’t exist
- The “cs_comments_service” provider has been renamed “legacy” - when we implement the new discussions micro-frontend, we’ll also have a separate provider for that, so they can’t both be “cs_comments_service”.  Also, cs_comments_service is such a bad name for anything.
- The hard-coded providers list in get_supported_providers now includes ‘legacy’ and ‘piazza’, our two known providers.  This list will be updated as more known providers come online.
- The PROVIDER_FEATURE_MAP has similarly been updated.

Part of this task: TNL-8093

BREAKING CHANGE: Remove WaffleSwitchNamespace, WaffleSwitch, WaffleFlagNamespace,
and WaffleFlag from waffle_utils, in favor of the Legecy* classes
in edx-toggles. Although this is a breaking change, we have
preemptively removed all known uses.

BD-21

* temp: remove false positives on safe sessions middleware

This is a temporary fix to deal with false positives in the system due
to the masquerading feature.  Long term we may not want to rely on
knowing about how masquerding works in the safe sessions middleware and
instead manage masquerding of the requset user in some other way.

Co-authored-by: Robert Raposa <rraposa@edx.org>

The toggle state report could not be shared with other IDAs. Here we make use
of the newly available report from edx_toggles, and customize it to add data
from WaffleFlagCourseOverrideModel.

site configuration to email context.

If this happens, it's usefule to know what main view code was being
targetd so that we can more easily investigate what might have caused
this issue.

Add a new custom attribute 'safe_sessions.user_mismatch' to find
requests that had this issue in our monitoring system.

Currently extra query params are not being handled in get TPAContextView,
Fixed using already available get_next_url_for_login_page().

VAN-415

Co-authored-by: Muhammad Soban Javed <58461728+iamsobanjaved@users.noreply.github.com>

Co-authored-by: Muhammad Soban Javed <58461728+iamsobanjaved@users.noreply.github.com>

Ran pyupgrade on {debug, demographics, discussions}.

Updates the annotations for the block structure settings and toggles based on a [discussion] that was held on the pull request that annotated those same settings and toggles.

It also adds the DEPR tickets that were promised earlier in the annotations.
For future reference, there's also a [forum thread] to discuss the DEPR tickets titled.

[discussion]: https://github.com/edx/edx-platform/pull/26175#issuecomment-800632485

[forum thread]: https://discuss.openedx.org/t/deprecation-removal-several-block-structure-caching-settings-depr-143-depr-144-depr-145-depr-146/4288?u=nizar

Added a new property in edx.bi.user.account.registered event to
track total time it took the user to register.

VAN-413

Removes waffle flag restriction for syncing certificate available dates
to the credentials service.

add traits to segment context for enrollment activated events

I had the wrong attribute before this commit, and Django Admin let
me get away with it because it doesn't explode when you try to grab
relations that aren't there–it just quietly returns None in some of
those cases.