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_00000000000192bb.go

@@ -0,0 +1,35 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (darwin && amd64) || (darwin && arm64) || (freebsd && amd64) || (freebsd && arm) || (freebsd && arm64) || (linux && amd64) || (linux && arm64) || (linux && riscv64) || (openbsd && amd64) || (openbsd && arm64)
+
+package sqlite3
+
+const __FLT16_DECIMAL_DIG__ = 5
+
+const __FLT16_DENORM_MIN__ = 0
+
+const __FLT16_DIG__ = 3
+
+const __FLT16_EPSILON__ = 0
+
+const __FLT16_HAS_DENORM__ = 1
+
+const __FLT16_HAS_INFINITY__ = 1
+
+const __FLT16_HAS_QUIET_NAN__ = 1
+
+const __FLT16_MANT_DIG__ = 11
+
+const __FLT16_MAX_10_EXP__ = 4
+
+const __FLT16_MAX_EXP__ = 16
+
+const __FLT16_MAX__ = 0
+
+const __FLT16_MIN_10_EXP__ = -4
+
+const __FLT16_MIN_EXP__ = -13
+
+const __FLT16_MIN__ = 0
+
+const __FLT16_NORM_MAX__ = 0