[Feature] Backlog Core Commands

[djm81]

Feature: Backlog Core Commands

Parent Epic: #186 specfact backlog

Groups the core backlog command functionality: dependency analysis, interactive issue creation, runtime discovery, user modules bootstrap, custom field writeback, and ADO required fields.

Child User Stories

• Add backlog dependency analysis and command suites #116 — backlog-core-01 (dependency analysis commands) — closed
• [Change] Implement backlog refine --import-from-tmp #155 — (backlog early story) — closed
• [Change] Add debug logs under ~/.specfact/logs with rich operation metadata #158 — (backlog early story) — closed
• [Change] Improve backlog refine and CLI startup #166 — (backlog early story) — closed
• [Change] Add backlog add (interactive issue creation) #173 — backlog-core-02 (interactive issue creation) — closed
• Backlog Core — Installed Runtime Discovery Parity and Backlog Add Prompt #295 — backlog-core-04 (installed runtime discovery) — closed
• Backlog Core — User Modules Bootstrap and Prompt Resource Sync #298 — backlog-core-05 (user modules bootstrap) — closed
• Backlog Core - Refine custom field writeback reliability and prompt contract hardening #310 — backlog-core-06 (refine custom field writeback) — closed
• [Bug] ADO required custom fields not fully handled in backlog add/map-fields #337 — backlog-core-07 (ADO required custom fields and picklists) — open

Note: backlog-core-03 (refine writeback field splitting) was archived without a GitHub issue.