p2: digest with in-sift FIFO, SQLite caches, Honcho context, recover

Dixie is capped (max_inflight 2, queue_depth 8, queue_wait 20s) and
never queued on llama-server. Streaming chat, thinking off, 45s
fallback to clean. Digest and chunk-embedding caches are
content-addressed SQLite (Honcho context is not cached). Recover
uses the guarded Fetcher. guardian-star is refused in code.

vendor/modernc.org/sqlite/lib/sqlite_g_0000000000018800.go

@@ -0,0 +1,29 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (linux && ppc64le) || (openbsd && amd64) || (openbsd && arm64)
+
+package sqlite3
+
+const FIOASYNC = 2147509885
+
+const FIOCLEX = 536897025
+
+const FIONBIO = 2147509886
+
+const FIONCLEX = 536897026
+
+const FIONREAD = 1073768063
+
+const TIOCGPGRP = 1073771639
+
+const TIOCGWINSZ = 1073771624
+
+const TIOCOUTQ = 1073771635
+
+const TIOCSPGRP = 2147513462
+
+const TIOCSTART = 536900718
+
+const TIOCSTOP = 536900719
+
+const TIOCSWINSZ = 2147513447