errors: unresolved symbols error with Clojure's message (jolt-2o7.3)

A typo'd symbol used to auto-intern an unbound var and die later as
'Cannot call nil as a function' with no hint which symbol. Now:

    $ jolt -e '(undefined-fn 1)'
    Error: Unable to resolve symbol: undefined-fn in this context

The analyzer's :unresolved fallthrough now punts to the interpreter
(whose resolver raises the message above when the form runs) instead of
emitting a var-ref that interned the var. A punt rather than a hard
throw because runtime-interning forms (defmulti's setup) legitimately
reference the var they're about to create from a nested do.

Pulling that thread surfaced three real bugs the leniency was masking:

- h-resolve-global resolved unqualified symbols against ctx-current-ns,
  which during analysis is jolt.analyzer — so user-ns vars NEVER
  resolved through it; the lenient arm happened to emit the right ns.
  Now resolves against the compile ns like the qualified branch.
- Top-level (do ...) wasn't split: Clojure compiles and EVALS each
  child in sequence so earlier children's runtime effects (defmulti's
  intern) are visible while later children compile. eval-toplevel now
  splits.
- The stdlib itself had forward references the auto-intern hid:
  10-seq's transducers used vreset!/vswap! from 20-coll (moved to
  10-seq); in 20-coll qualified-ident?/realized?/list*/underive
  referenced defs declared later in the file (reordered); sorted? and
  partition-all are genuinely later-tier and got (declare ...).

Test rows updated where they encoded the old leniency: ir-passes'
dead-branch row (unresolved in a dead branch is an error, as in
Clojure), compile-mode's ctx-isolation row (other ctx now errors
instead of reading nil), cli rows assert the new message. Gate green,
conformance 335/335 x3, suite 4718 steady, bench within noise.

jolt-core/clojure/core/10-seq.clj

@@ -8,6 +8,14 @@
 ;; self-hosted compiler (jolt-core/jolt/*.clj). Compiler-facing structural fns go
 ;; in the kernel tier (00-kernel) instead — see its header.
 
+;; Volatiles (moved up from 20-coll: this tier's transducers use them, and the
+;; analyzer now ERRORS on unresolved forward references — jolt-2o7.3). The
+;; constructor (volatile!) stays native; these are pure over ref-put!/get.
+(defn vreset! [vol newval]
+  (jolt.host/ref-put! vol :val newval) newval)
+(defn vswap! [vol f & args]
+  (vreset! vol (apply f (get vol :val) args)))
+
 (defn ffirst [coll] (first (first coll)))
 (defn nfirst [coll] (next (first coll)))
 (defn fnext  [coll] (first (next coll)))