It can be a mystery deducing what type of forces conspire to make a television show. But for Pamela, A Love Story, the new 55-year-old-Anderson-approved Netflix documentary, a response to the raucous and “re-traumatising” “Pam & Tommy,” clarity isn’t entirely needed. Drawing from diaries, videotapes and archival footage Anderson has kept under her proverbial mattress for decades, the one hour and 52 minute piece – placed under the genres Investigative and Intimate – presents a compassionate, complicated portrait of a woman all too often reduced to a late-night punchline.  The series, which comes in the wake of ultra-meta vulnerability projects…