Point search pipeline at Search2 table and *2 procs for v5 POC

Re-target all search reads, writes, and stored proc calls to dbo.Search2 /
SubmitSearch2 / StartSearch2 / CompleteSearch2 / ResetPartialSearches2 so
the POC can run side-by-side with prod against the same QA database
without contending on the Search table or its procs. Standalone deployment
SQL for the new table and procs lives in OLD/sql/ and must be run against
the target DB before the POC apps are started.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

OLD/sql/StartSearch2.sql

@@ -0,0 +1,9 @@
+CREATE PROCEDURE [dbo].[StartSearch2] (@p_SearchID INT)
+AS
+    BEGIN
+		--Update search status and start timestamp
+        UPDATE  dbo.Search2
+        SET     Status = 2,
+                StartDT = GETDATE()
+        WHERE   ID = @p_SearchID;
+    END