Put every tmpfs path in one place both layers can read

Plugin/unraid/include/ai.php

@@ -79,7 +79,8 @@
 
 require_once __DIR__ . '/config.php';
 
-define('VV_AI_JOB_DIR', '/tmp/varaverk_ai_jobs');
+// VV_AI_JOB_DIR and VV_AI_TOKEN_CACHE_DIR are defined in config.php with every other cache path,
+// read from master.conf so this layer and load_config.sh cannot disagree about where they are.
 const VV_AI_KINDS = ['header', 'readme', 'manual', 'template', 'doc'];
 
 // Profiles — what each one is, and what it is allowed to see and do. One table, in one file,
@@ -671,10 +672,9 @@ function vv_ai_token_prune(string $db): void {
 // Partner ledgers pulled by AI/ai_token_sync.sh into tmpfs. Same trick conf_sync.sh uses for
 // partner confs: the reader treats a missing file as "unknown", never as zero.
 //
-// Mirrors AI_TOKEN_CACHE_DIR in load_config.sh. Hardcoded rather than read from conf because it
-// is a derived path constant on the shell side too — neither end reads it from a conf file, so
-// there is no single value to drift away from.
-const VV_AI_TOKEN_CACHE_DIR = '/tmp/.cache/vv/ai';
+// The directory is AI_TOKEN_CACHE_DIR from master.conf, resolved in config.php. It used to be
+// hardcoded here, on the reasoning that the shell side hardcoded it too and so there was no
+// single value to drift away from — true when it was written, and no longer true.
 
 // Aggregates the file into today / last 7 days / all time, both overall and per host.
 //