Remove legacy pc tables, fix ASP issues, update dashboard APIs

Database changes (run sql/migration_drop_pc_tables.sql on prod):
- Drop pc, pc_backup_phase2, pc_to_machine_id_mapping tables
- Rename pcid columns to machineid in machineoverrides, dualpathassignments, networkinterfaces
- Recreate 9 views to use machines.machineid instead of pcid
- Clean orphaned records and add FK constraints to machines table

ASP fixes:
- editprinter.asp: Fix CLng type mismatch when no printerid provided
- includes/sql.asp: Remove AutoDeactivateExpiredNotifications (endtime handles expiry)
- includes/leftsidebar.asp: Update fiscal week banner styling, remove dead Information link
- charts/warrantychart.asp: Use vw_warranty_status instead of pc table

Dashboard API renames (naming convention):
- shopfloor-dashboard: Update to use apishopfloor.asp, apibusinessunits.asp
- tv-dashboard: Rename api_slides.asp to apislides.asp

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

includes/sql.asp

@@ -1,26 +1,4 @@
 <%
-'=============================================================================
-' SUBROUTINE: AutoDeactivateExpiredNotifications
-' PURPOSE: Automatically deactivate notifications where endtime has passed
-'
-' LOGIC:
-'   - Find all active notifications where endtime < NOW() (expired)
-'   - Set isactive = 0 for those notifications
-'   - This provides automatic cleanup without manual intervention
-'
-' RUNS: On every page load (minimal performance impact - simple UPDATE query)
-'=============================================================================
-Sub AutoDeactivateExpiredNotifications()
-	On Error Resume Next
-	Dim strAutoDeactivate
-	strAutoDeactivate = "UPDATE notifications SET isactive = 0 " & _
-	                    "WHERE isactive = 1 " & _
-	                    "AND endtime IS NOT NULL " & _
-	                    "AND endtime < NOW()"
-	objConn.Execute strAutoDeactivate
-	On Error Goto 0
-End Sub
-
 	' objConn - script-global connection object (no Dim for global scope)
 	Session.Timeout=15
 	Set objConn=Server.CreateObject("ADODB.Connection")
@@ -37,8 +15,4 @@ End Sub
 	                         "Pooling=True;Max Pool Size=100;"
 	objConn.Open
 	set rs = server.createobject("ADODB.Recordset")
-
-	' Auto-deactivate expired notifications
-	' This runs on every page load to ensure notifications with past endtime are automatically disabled
-	Call AutoDeactivateExpiredNotifications()
 %>