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_0000000000011620.go

@@ -0,0 +1,21 @@
+// Code generated by modernc.org/undup from the per-target sqlite_*.go files; DO NOT EDIT.
+
+//go:build (freebsd && arm64) || (linux && arm64) || (linux && loong64) || (linux && riscv64) || (openbsd && arm64)
+
+package sqlite3
+
+const __DECIMAL_DIG__ = 36
+
+const __LDBL_DECIMAL_DIG__ = 36
+
+const __LDBL_DIG__ = 33
+
+const __LDBL_MANT_DIG__ = 113
+
+const __LDBL_MAX_10_EXP__ = 4932
+
+const __LDBL_MAX_EXP__ = 16384
+
+const __LDBL_MIN_10_EXP__ = -4931
+
+const __LDBL_MIN_EXP__ = -16381