Schema term tracker

Parent issue tracking proposed schema terms

| Attribute | Original Schema | Current Status | Decision Needed? | Sub-issue |
|-----------|----------------|----------------|------------------|-----------|
| `sorted_name_length_pairs` | Minimal | Recommended in spec (5.2) | ✅ Resolved | N/A |
| `accessions` | Not included | Removed from minimal | ❓ Needs decision | #79 |
| `masks` | Extended | Not in spec | ❓ Needs decision | #29 (related to gaps/fingerprinting) |
| `priorities` | Extended | Not in spec | ❓ Needs decision | None |
| `topologies` | Extended | Not in spec | ❓ Needs decision | None |
| `molecule_types` | Extended | Not in spec | ❓ Needs decision | #16 (molecule designation) |
| `alphabets` | Extended | Not in spec | ❓ Needs decision | #46 (alphabet as inherent property) |
| `alphabet_domains` | Extended | Not in spec | ❓ Needs decision | None |

Start by reviewing the schema term table and the referenced issues #79, #29, #16, and #46, along with section 5.2 of the specification. Done means reaching decisions for the unresolved terms—accessions, masks, priorities, topologies, molecule_types, alphabets, and alphabet_domains—and recording their status in this tracker.

Written by the indexing model from the issue text.