fix(ux): MCP tool errors set isError; add `sibyl migrate --force`

release: cli 0.3.11 + hermes 0.3.8 - init-perms 0700 + claude-mcp post-wire verify (cli); prefetch untrusted-context fence (hermes)

pre-release: combined patch - cli 0.3.10 (hermes install TypeError) + client 0.4.6 (negative-limit guard)

release: sibyl-memory-cli 0.3.9 (guided `sibyl migrate` + Codex + Claude MCP fix)

voice: strip em dashes repo-wide per rule 9

Initial release: Sibyl Memory Plugin family v0.1.0