memory: SIBO Workabout MX project state for cross-session resume (#60)

Persist the state of the Psion Workabout MX reverse-engineering / barcode-inventory project so it can be resumed in a future session after a reboot.

Adds `home/claude/memory/sibo_workabout_mx_scanner.md` (project memory) and indexes it in `MEMORY.md`. Records: the repo/branch and committed docs, the confirmed scanner behaviour, the key finding that the scanner is an OO library object driven via p_getlibh/p_newsend/p_send, the blocker (on-device ordinal capture), the RE toolchain, and where the continuation procedure lives.

Takes effect after a home-manager rebuild.

Reviewed-on: #60

home/claude/memory/MEMORY.md

@@ -5,6 +5,7 @@
 - [Git commit signing](git_commit_signing.md) — signs in-sandbox via ssh-agent (allowAllUnixSockets + inlined pubkey)
 - [Git check state first](git_check_state.md) — always check branch/status/divergence before git work; Lyra edits repos between sessions
 - [Keep docs updated](docs_keep_updated.md) — update docs in the same pass as code/config changes; stale docs are a defect
+- [SIBO Workabout MX project](sibo_workabout_mx_scanner.md) — RE + barcode-inventory project state; scanner is an OO DYL object (oscanner), blocked on on-device ordinal capture; resume via code/inventory/CONTINUATION.md
 - [Jira tooling](jira_tooling.md) — comments are Markdown not wiki; transitions may need assignee; link direction; WSP transition IDs
 - [Review and comments workflow](workflow_review_and_comments.md) — show PR body and non-trivial Jira comments before posting; terse IaC code comments; PR body content rules
 - [Sandbox prompts](feedback_sandbox_prompts.md) — don't prompt for sandbox-disable or routine read-only shell ops; broaden permissions instead