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_0000000000004007.go

@@ -0,0 +1,36 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (darwin && amd64) || (darwin && arm64) || (freebsd && 386) || (netbsd && amd64)
+
+package sqlite3
+
+import (
+	"modernc.org/libc"
+)
+
+const _POSIX_VERSION = 200112
+
+// C documentation
+//
+//	/*
+//	** Find the current time (in Universal Coordinated Time).  Write into *piNow
+//	** the current time and date as a Julian Day number times 86_400_000.  In
+//	** other words, write into *piNow the number of milliseconds since the Julian
+//	** epoch of noon in Greenwich on November 24, 4714 B.C according to the
+//	** proleptic Gregorian calendar.
+//	**
+//	** On success, return SQLITE_OK.  Return SQLITE_ERROR if the time and date
+//	** cannot be found.
+//	*/
+func _unixCurrentTimeInt64(tls *libc.TLS, NotUsed uintptr, piNow uintptr) (r int32) {
+	bp := tls.Alloc(16)
+	defer tls.Free(16)
+	var rc int32
+	var _ /* sNow at bp+0 */ Ttimeval
+	_ = rc
+	rc = SQLITE_OK
+	libc.Xgettimeofday(tls, bp, uintptr(0)) /* Cannot fail given valid arguments */
+	**(**Tsqlite3_int64)(__ccgo_up(piNow)) = _unixEpoch + int64(1000)*int64((**(**Ttimeval)(__ccgo_up(bp))).Ftv_sec) + int64((**(**Ttimeval)(__ccgo_up(bp))).Ftv_usec/int32(1000))
+	_ = NotUsed
+	return rc
+}