docs(wiki): document Cryptographic Attacks agent skill; record XBEN-099/100/102 solves - Agent-Skills.md: add crypto_attack (CRYPT) to the built-in skill tables and a dedicated section; refresh the table to also list access_control and xxe. - XBOW-Validation-Benchmark.md: XBEN-099 (IDOR), 100 (GraphQL field disclosure), 102 (broken access control) recorded as solved (87 -> 90 / 104); XBEN-101 left pending. Add the decoded walkthroughs + raw session exports for this and prior batches (091/093/094/095/096/098/099/100/102).