.Net: docs: Fix ADR numbering (#13546)

# PR: Fix ADR Numbering - Move LINQ Text Search Filtering ADR to 0073

## Motivation and Context

The LINQ-based text search filtering ADR was incorrectly numbered as
0065, conflicting with an existing ADR. This PR corrects the numbering
to 0073 (the next available number) and updates all code references.

## Changes Made

- Renamed `docs/decisions/0065-linq-based-text-search-filtering.md` →
`docs/decisions/0073-linq-based-text-search-filtering.md`
- Deleted the ADR reference in `SearchQueryFilterClause.cs` to remove
the maintenance between docs and code.
- Merged latest commits from `feature-text-search-linq` branch (2 bug
fix commits)

## Files Changed

- `docs/decisions/0073-linq-based-text-search-filtering.md`
(renamed/moved)
-
`dotnet/src/Plugins/Plugins.Web/FilterClauses/SearchQueryFilterClause.cs`
(ADR link updated)

## Contribution Checklist

- [x] Documentation updated with correct ADR numbering
- [x] Code references updated to point to correct ADR location
- [x] Merged with latest feature branch commits

Co-authored-by: Alexander Zarei <alzarei@users.noreply.github.com>

Author: alzarei

…0065-linq-based-text-search-filtering.md …0073-linq-based-text-search-filtering.mddotnet/docs/decisions/0065-linq-based-text-search-filtering.md renamed to docs/decisions/0073-linq-based-text-search-filtering.md dotnet/docs/decisions/0065-linq-based-text-search-filtering.md renamed to docs/decisions/0073-linq-based-text-search-filtering.md

@@ -17,8 +17,6 @@ namespace Microsoft.SemanticKernel.Plugins.Web;
 /// the search term and appends it to the base query for enhanced relevance.
 ///
 /// Example: Title.Contains("AI") → SearchQueryFilterClause("AI") → query + " AI"
-///
-/// See docs/decisions/0065-linq-based-text-search-filtering.md for architectural context and cross-engine comparison.
 /// </remarks>
 internal sealed class SearchQueryFilterClause : FilterClause
 {