DOCS-1827 - Consolidate Query Assist into Search Autocomplete

[kimsauce]

Purpose of this pull request

Retires the standalone Query Assist doc, which was never a UI-labeled feature, and merges its content into the existing Search Autocomplete page. Adds cross-link notes so Search Autocomplete, AI Parse Assist, and Mobot's Log Analysis Agent (three easily-confused AI-assisted search capabilities) are clearly distinguished from one another. Fixes two dead release-note links that pointed at the retired page, adds a redirect for the old URL, and removes orphaned/stale screenshots. Also includes an unrelated small fix: shrinks the account-preferences icon and moves it inline with its instruction text in two other docs.

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

https://sumologic.atlassian.net/browse/DOCS-1827

[JV0812]

Heads-up: cross-PR conflict with #7058

While reviewing #7058 ("DOCS-1798 - Cross-link Mobot on high-traffic search docs"), I noticed it modifies docs/search/query-assist.md (uncommenting a Mobot callout there), while this PR deletes that same file entirely as part of consolidating it into search-autocomplete.md.

Whichever of these two PRs merges second should account for the other:

• If this PR (DOCS-1827 - Consolidate Query Assist into Search Autocomplete #7061) merges first, DOCS-1798 - Cross-link Mobot on high-traffic search docs #7058's edit to query-assist.md becomes moot (file gone).
• If DOCS-1798 - Cross-link Mobot on high-traffic search docs #7058 merges first, this PR needs to make sure the new Mobot callout isn't silently dropped when query-assist.md's content is folded into search-autocomplete.md.

Just flagging for merge sequencing, not a blocker on either PR's own content.

[kimsauce]

Merge order: this PR (#7061) should merge before #7068 (DOCS-78, Get Started with Search category refactor). They both touch search-autocomplete.md, sidebars.ts, and cid-redirects.json. Once this lands I'll rebase #7068 on main and reconcile search-autocomplete.md there.

[JV0812]

Reviewed the full diff and ran a from-scratch yarn build on the branch — no broken links/anchors. Verified the redirect, sidebar removal, and orphaned-image cleanup are all correct, and double-checked the account-preferences icon change is legitimate (the underlying image is a 60×60px icon, not a screenshot, so shrinking it to inline size is correct).

One thing this missed: docs/manage/data-masking.md line 80 still says "Masking is not applied to query-assist suggestions" — this PR retires the "Query Assist" name everywhere else in favor of "Search Autocomplete," but that one reference wasn't updated. Not a broken link (no URL/anchor involved), just a stale term left behind. Checked the whole repo for other "Query Assist" mentions — this is the only one still using the old name.

[JV0812]

Verified via full local build (no broken links/anchors) plus a repo-wide check for dangling references to the deleted page/anchors/images — none found. Left one non-blocking comment about a stale terminology reference in data-masking.md.

[kimsauce]

Re: @JV0812's note about the stale term — docs/manage/data-masking.md isn't in this PR's diff, so GitHub won't take an inline suggestion on it. Here's the exact edit to make directly on the DOCS-1827 branch (Edit file on docs/manage/data-masking.md, line 80):

Current (line 80):

| **Query assist suggestions** | Masking is not applied to query-assist suggestions, regardless of the user's role or data access level. |

Change to:

| **Search autocomplete suggestions** | Masking is not applied to search autocomplete suggestions, regardless of the user's role or data access level. |

Two swaps on that one line: the bold row label Query assist suggestions → Search autocomplete suggestions, and query-assist suggestions → search autocomplete suggestions in the cell text. Nothing else in that file needs to change.