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_00000000000037c0.go

@@ -0,0 +1,99 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (linux && 386) || (linux && amd64) || (linux && arm) || (linux && arm64) || (linux && loong64) || (linux && riscv64) || (linux && s390x)
+
+package sqlite3
+
+const EDEADLOCK = 35
+
+const F2FS_IOC_ABORT_VOLATILE_WRITE = 62725
+
+const F2FS_IOC_COMMIT_ATOMIC_WRITE = 62722
+
+const F2FS_IOC_GET_FEATURES = 2147546380
+
+const F2FS_IOC_START_ATOMIC_WRITE = 62721
+
+const F2FS_IOC_START_VOLATILE_WRITE = 62723
+
+const FIOASYNC = 21586
+
+const FIOCLEX = 21585
+
+const FIONBIO = 21537
+
+const FIONCLEX = 21584
+
+const FIONREAD = 21531
+
+const MAP_LOCKED = 8192
+
+const MAP_NORESERVE = 16384
+
+const MCL_ONFAULT = 4
+
+const TCFLSH = 21515
+
+const TCGETA = 21509
+
+const TCGETS = 21505
+
+const TCGETX = 21554
+
+const TCSBRK = 21513
+
+const TCSETA = 21510
+
+const TCSETAF = 21512
+
+const TCSETAW = 21511
+
+const TCSETS = 21506
+
+const TCSETSF = 21508
+
+const TCSETSW = 21507
+
+const TCSETX = 21555
+
+const TCSETXF = 21556
+
+const TCSETXW = 21557
+
+const TCXONC = 21514
+
+const TIOCGDEV = 2147767346
+
+const TIOCGEXCL = 2147767360
+
+const TIOCGISO7816 = 2150126658
+
+const TIOCGPGRP = 21519
+
+const TIOCGPKT = 2147767352
+
+const TIOCGPTLCK = 2147767353
+
+const TIOCGPTN = 2147767344
+
+const TIOCGPTPEER = 21569
+
+const TIOCGWINSZ = 21523
+
+const TIOCINQ = 21531
+
+const TIOCOUTQ = 21521
+
+const TIOCSIG = 1074025526
+
+const TIOCSISO7816 = 3223868483
+
+const TIOCSPGRP = 21520
+
+const TIOCSPTLCK = 1074025521
+
+const TIOCSWINSZ = 21524
+
+const _IOC_NONE = 0
+
+const _IOC_WRITE = 1