Per-soul memory and interactive roster consolidation

Part of #16, deliberately last: the interactive roster is the least load-bearing part of the factory.

• Per-soul memory at ~/.claude/agent-memory/<name>/ with lessons.md (corrections given, patterns learned) and journal.md (append-only track record); the soul instructs read memory first, append what you learned last
• Corrections loop: when the human says "stop flagging that, it is intentional" the correction lands in that soul's lessons and never recurs
• Consolidate the ten agents in ~/.claude/agents/ into four or five real characters sharing the souls roster: builder, skeptic (review and security merged), test obsessive, operator and librarian
• Each remaining agent file is a thin wrapper per #19 so the same character exists in sessions and in the factory

The measure of success from the design note: a plain persona that remembers corrections becomes distinctive within weeks; a beautiful persona with no memory is a mask.

Start with the design note and the related issues #16 and #19, then inspect ~/.claude/agents/. Define the per-soul structure under ~/.claude/agent-memory//, including lessons.md and journal.md, before consolidating the ten agents into the listed characters. Done means corrections persist per soul and the remaining agent files are thin wrappers sharing that roster.