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_0000000000018003.go

@@ -0,0 +1,47 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (darwin && amd64) || (darwin && arm64) || (openbsd && amd64) || (openbsd && arm64)
+
+package sqlite3
+
+type Tdev_t = int32
+
+type Tflock = struct {
+	Fl_start  Toff_t
+	Fl_len    Toff_t
+	Fl_pid    Tpid_t
+	Fl_type   int16
+	Fl_whence int16
+}
+
+type Tsigset_t = uint32
+
+type Twint_t = int32
+
+const _POSIX2_SW_DEV = 200112
+
+const _POSIX_ADVISORY_INFO = -1
+
+const _POSIX_ASYNCHRONOUS_IO = -1
+
+const _POSIX_MESSAGE_PASSING = -1
+
+const _POSIX_PRIORITY_SCHEDULING = -1
+
+const _POSIX_REALTIME_SIGNALS = -1
+
+const _POSIX_THREAD_PRIORITY_SCHEDULING = -1
+
+const _POSIX_THREAD_PRIO_INHERIT = -1
+
+const _POSIX_THREAD_PRIO_PROTECT = -1
+
+const _POSIX_TIMERS = -1
+
+const _POSIX_V6_ILP32_OFF32 = -1
+
+const _POSIX_V7_ILP32_OFF32 = -1
+
+const _XOPEN_CRYPT = 1
+
+const __STDC_NO_THREADS__ = 1