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_0000000000003fc3.go

@@ -0,0 +1,28 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (darwin && amd64) || (darwin && arm64) || (linux && 386) || (linux && amd64) || (linux && arm) || (linux && arm64) || (linux && loong64) || (linux && ppc64le) || (linux && riscv64) || (linux && s390x)
+
+package sqlite3
+
+const FP_ILOGBNAN = -2147483648
+
+const HAVE_PREAD = 1
+
+const HAVE_PWRITE = 1
+
+type Tiovec = struct {
+	Fiov_base uintptr
+	Fiov_len  Tsize_t
+}
+
+const USE_PREAD = 1
+
+const WNOHANG = 1
+
+const WUNTRACED = 2
+
+const _XOPEN_ENH_I18N = 1
+
+const _XOPEN_UNIX = 1
+
+type iovec = Tiovec