v0.349.0

• fix(specs): spec import strips frontmatter and reports criteria it cannot read (#4840)
• feat(runner): buildd top opens on every team, filters by team first, and keeps finished missions with their date (#4831)
• docs(specs): unique gradable ids and code-checked facts in 23 spec files (#4842)
• docs(specs): gradable ids and stale facts in fourteen repo specs (#4839)
• docs(specs): workflow state kernel keeps the state machine; slice history and landing criteria move out (#4838)
• fix(runner): a failed auto-update never leaves the runner without its packages (#4829)
• docs: per-package LICENSE files, a CLA and a licensing section in the README (#4841)
• fix(claim): never deliver an expired subscription login on a claim (#4837)