Fix arg evaluation order + host interop gaps so reitit/selmer/honeysql run

Shaking the ring-app example's real library stack out against jolt surfaced a
batch of divergences from JVM Clojure, the biggest being evaluation order.

backend_scheme: call and recur arguments were emitted as bare Scheme operands,
so Chez's unspecified (right-to-left) order won out. Clojure evaluates left to
right, which selmer's reader loop relies on: (recur (add-node ... rdr) (read-char
rdr)) consumed a char early and dropped the first chars of every {{tag}}. Bind
operands to fresh temps in a let* (only when two or more can have side effects,
so hot calls over locals/consts stay un-wrapped). emit-ordered already did this
for collection literals; generalize it.

host-contract: syntax-quote now resolves the alias part of a qualified symbol
(impl/foo -> clojure.tools.logging.impl/foo) instead of leaving it bare, which
limped along via short-name matching until two loaded namespaces (reitit.impl,
clojure.tools.logging.impl) shared the short name and it broke.

collections: key-hash masks with bitwise-and, not fxand — jolt-hash is set!-
decorated per type (records return their own hash) and Chez's equal-hash can be a
bignum, so a key's hash isn't always a fixnum.

seq: even?/odd? handle bignums (JVM accepts any integer; the fxand crashed).

records: Keyword/Symbol .sym/.getName/.toString (honeysql's :clj branch reads
(.sym k)); Throwable .getMessage/.toString over a Chez condition.

host-static: __register-class-ctor!/__register-class-statics! so a host shim
(reitit.trie-jolt) can mirror a Java class.

natives-str: String.intern returns the string.

sqlite: jdbc.core fetch/fetch-one kebab-case column keys (the jolt-lang/db
convention; created_at -> :created-at).

io: a relative io/file path resolves against JOLT_PWD (the user's cwd), not the
repo root the launcher cd'd to — matches JVM cwd semantics, so config.edn loads.

cli: render an uncaught jolt throw (ex-info message + ex-data, or a condition)
instead of Chez's opaque "non-condition value" dump.

host/chez/seq.ss

@@ -255,8 +255,11 @@
 ;; Return Scheme #t/#f (= jolt true/false). All-flonum model: coerce to an exact
 ;; integer for the parity tests.
 ;; ============================================================================
-(define (jolt-even? n) (fx=? 0 (fxand (->idx n) 1)))
-(define (jolt-odd? n) (fx=? 1 (fxand (->idx n) 1)))
+;; Parity over the full integer range (JVM even?/odd? accept any integer,
+;; bignums included); a fixnum-only fxand crashes on a large value (e.g. a hash).
+(define (parity-int n) (if (flonum? n) (exact (floor n)) n))
+(define (jolt-even? n) (even? (parity-int n)))
+(define (jolt-odd? n) (odd? (parity-int n)))
 (define (jolt-pos? n) (> n 0))
 (define (jolt-neg? n) (< n 0))
 (define (jolt-zero? n) (= n 0))