WhatsApp L7 Active Message Types

A messaging analytics pipeline computes L7 (Last 7 Days) activity rollups — grouping low-level message types into higher-level categories and counting how many days each category had at least one active type. **Inputs:** - `activity_map`: Dictionary where each key is a message type and each value is a list of 7 binary values (1=active, 0=inactive) representing daily activity - `rollups`: Dictionary defining higher-level groupings of message types (rollup name → list of message type keys) **Output:** A dictionary mapping each rollup name to the count of days (out of 7) where at least one message type in that rollup had activity. **Key Rules:** - A day is active for a rollup if ANY of its constituent message types has value 1 on that day - Return one count per rollup — the number of such active days