Updates website build to no longer dynamically generate
`fallback/index.js`. Instead, the redirects are hard-coded in
`fallback/routes.js`.

This work is in preparation for the Docusaurus migration.


[AB#19990](https://dev.azure.com/fluidframework/235294da-091d-4c29-84fc-cdfc3d90890b/_workitems/edit/19990)

…idFramework into test/log-data

## Description

Adjusts the `condition` parameter of
`include-conditionally-run-stress-test` to apply to the entire stage
rather than the test-running job. This improves the clarity from the
pipeline overview page, see most recent run vs previous ones:


![image](https://github.com/user-attachments/assets/e344d02a-a617-4163-bbda-0bfaac276541)

This also fixes the `stressMode` parameter not being given options at
queue time, which was introduced in microsoft#21702 and prevented the pipeline
from being queued.

---------

Co-authored-by: Abram Sanderson <[email protected]>

…ments (microsoft#22946)

## Description

See changeset for details.

…ched tree (microsoft#22947)

## Description

It is possible to load a summary into a detached SharedTree. In this
case, the detached revision that is used to generate sequence IDs for
commits while detached must be updated to ensure that it doesn't
duplicate any of the sequence IDs already used in the summary. This PR
fixes the issue and also adds an assert when sequencing in the
EditManager to ensure that we don't sequence regressive sequence IDs.

This fix also allows us to trim the trunk when summarizing (without
breaking our fuzz tests), which reduces summary sizes especially for
detached trees with many synchronous edits.

…oft#22953)

## Description

Make SchematizingSimpleTreeView implement TreeViewAlpha, and add some
helper types.

…2954)

previous shouldDeploy condition have not been included in deployment
condition. This variable has been updated to "forceDeployment" and
included back in the deployment condition.

shouldDeploy has been updated to check if release builds are the latest
version in its major version series.

…g-data

…idFramework into log-data