Rename product TallyFlow IoT → TallyFlow Edge across vault

Update product naming in docs, marketing, architecture, use cases,
and capabilities materials. Rename related notes, screenshot folder,
and marketing image filenames. Keep git/repo identifiers (e.g.
tallyflow-iot) and generic industry IoT language unchanged.

TallyFlow/Marketing/Website/Website Requirements from SOWs.md

@@ -17,7 +17,7 @@
 - **Parent/child asset handling** (asset can remain while children/tags are detached)
 
 ### 3. ERP Integration
-- Primary: TallyFlow IoT using keyboard wedge, database integration, and spreadsheet output
+- Primary: TallyFlow Edge using keyboard wedge, database integration, and spreadsheet output
 - Additional opportunities in TallyFlow Core using the API and webhooks
 
 ### 4. Tag Printing & Encoding
@@ -40,11 +40,11 @@
 - "Automate verification without changing your existing workflows"
 
 ### Feature Highlights to Emphasize
-- TallyFlow IoT (fixed infrastructure / tunnels)
+- TallyFlow Edge (fixed infrastructure / tunnels)
 - TallyFlow Capture (photo + barcode association)
 - TallyFlow Print (tag printing + registration)
 - Seamless ERP integration via keyboard wedge or API
-- Mobile + Web + IoT working together
+- Mobile + Web + Edge working together
 
 ### Target Audiences Visible in SOWs
 - Retail / Apparel (Alice + Olivia)