chore: snapshot working tree - pty_exited notifications + in-flight inference WIP

feat(booterm): structured pty_exited WS notifications. Plan-validated, impl-validated, code-reviewed green (contracts build clean, contracts test 29/29, booterm + web typecheck clean).

wip: in-progress inference/provider refactor (agents.ts, provider.ts, new llama-providers.ts, removed llama-args-validator), plus arena, dispatcher, compaction, schema changes.

openspec: pty-exit-notifications complete; x-agent-flags planned (not yet implemented).

apps/server/src/schema.sql

@@ -478,3 +478,17 @@ CREATE TABLE IF NOT EXISTS agent_snapshots (
 );
 CREATE INDEX IF NOT EXISTS idx_agent_snapshots_chat ON agent_snapshots(chat_id);
 CREATE UNIQUE INDEX IF NOT EXISTS idx_agent_snapshots_chat_unique ON agent_snapshots(chat_id);
+
+-- memory-browser-ui: topic-based memory, daily log, dream diaries.
+CREATE TABLE IF NOT EXISTS memory_entries (
+  id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  project_id  UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+  topic       TEXT NOT NULL,
+  title       TEXT NOT NULL,
+  content     TEXT NOT NULL DEFAULT '',
+  tags        TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
+  date        DATE,
+  mood        TEXT,
+  created_at  TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp()
+);
+CREATE INDEX IF NOT EXISTS idx_memory_entries_project ON memory_entries(project_id, created_at DESC);