**Description** Add missing transfer concept and air-gap how-to. Transfer is core to OCM but has no concept doc. **Tasks:** - [x] `content/docs/concepts/transfer-concept.md` (NEW concept) - Transfer mechanics, CTF usage, repo-to-repo, transport formats, use cases - [x] `content/docs/how-to/air-gap-transfer.md` (NEW how-to) - Prerequisites → CTF → offline transfer → import → verify **Done Criteria** - [x] Concept doc: transfer/transformation model - [x] How-to: air-gap workflow - [x] No duplicate content - [ ] All relrefs updated
Description
Add missing transfer concept and air-gap how-to. Transfer is core to OCM but has no concept doc.
Tasks:
content/docs/concepts/transfer-concept.md(NEW concept) - Transfer mechanics, CTF usage, repo-to-repo, transport formats, use casescontent/docs/how-to/air-gap-transfer.md(NEW how-to) - Prerequisites → CTF → offline transfer → import → verifyDone Criteria