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_000000000007bfff.go

@@ -0,0 +1,17 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (darwin && amd64) || (darwin && arm64) || (freebsd && 386) || (freebsd && amd64) || (freebsd && arm) || (freebsd && arm64) || (linux && 386) || (linux && amd64) || (linux && arm) || (linux && arm64) || (linux && loong64) || (linux && ppc64le) || (linux && riscv64) || (linux && s390x) || (openbsd && amd64) || (openbsd && arm64) || (windows && (amd64 || arm64)) || (windows && 386)
+
+package sqlite3
+
+const __INT_FAST8_MAX__ = 127
+
+const __INT_FAST8_WIDTH__ = 8
+
+const __UINT_FAST8_MAX__ = 255
+
+type mode_t = Tmode_t
+
+type off_t = Toff_t
+
+type pid_t = Tpid_t