Correct the "evidence cannot be faked" overclaim across the record (+ Flxnked grounding) (#48)

Manifesto Principle 2 + muscle-memory/image-is-the-proof posts + Field Guide hub + prod blog-seed: "evidence cannot be faked" -> "isolated evidence is cheap to fake; a coherent record is not." Adds the sourced Flxnked false-accusation case as grounding, framed on the show-data side. Includes the re-grounded trust-thesis memory.