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/libc/syscall_musl_time32.go

@@ -0,0 +1,11 @@
+// Copyright 2026 The Libc Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux && (386 || arm)
+
+package libc // import "modernc.org/libc"
+
+// sysClockNanosleepTime64 is the clock_nanosleep(2) syscall taking a 64-bit
+// struct timespec, which musl uses on targets whose time_t is wider than long.
+const sysClockNanosleepTime64 = SYS_clock_nanosleep_time64