Wrote SOP-TECH-DATA-STORES.md, broadcast it, requested formal SOP-INDEX.md registration, and flagged the follow-up as first-thing-next-session so it doesn't get lost.

Confirmed Media Library = media.db (same store already used, not a new one). Clarified Laboratory (laboratory.db) vs Media Library vs 30-app.db are three distinct things -- confirmed all 84 shortcuts already live in Laboratory from earlier today. Wrote SOP-TECH-DATA-STORES.md mapping all three stores plus a platform-wide rule (trace real nav path, don't infer from naming). Broadcast #49 sent + verified landed. Inbox #897 to Admin[00]/Master[01] requesting SOP-INDEX.md registration. Logged K306. Wrote first-thing-next-session flag into both todo-30.md (top of HIGH PRIORITY) and handoff-30.md (leads the file).