apl: glyph audit — ⍉ ⊢ ⊣ ⍕ wired (+6 tests, Phase 9 complete)

Glyph parser saw these but runtime had no mapping:
- ⍉ monadic + dyadic transpose (apl-transpose, apl-transpose-dyadic)
- ⊢ monadic identity / dyadic right (returns ⍵)
- ⊣ monadic identity / dyadic left (returns ⍺)
- ⍕ alias for ⎕FMT

Pipeline 99/99.  All Phase 9 items ticked.

Remaining gaps (next phase): ⊆ partition, ∪ unique, ∩ intersection,
⍸ where, ⊥ decode, ⊤ encode, ⍎ execute — parser recognises
them but runtime not yet implemented.

lib/apl/tests/pipeline.sx

@@ -431,3 +431,27 @@
           (file-read "lib/apl/tests/programs/primes.apl")
           " ⋄ primes 100"))))
   25)
+
+(apl-test
+  "⍉ monadic transpose 2x3 → 3x2"
+  (mkrv (apl-run "⍉ (2 3) ⍴ ⍳6"))
+  (list 1 4 2 5 3 6))
+
+(apl-test
+  "⍉ transpose shape (3 2)"
+  (mksh (apl-run "⍉ (2 3) ⍴ ⍳6"))
+  (list 3 2))
+
+(apl-test "⊢ monadic identity" (mkrv (apl-run "⊢ 1 2 3")) (list 1 2 3))
+
+(apl-test
+  "5 ⊣ 1 2 3 → 5 (left)"
+  (mkrv (apl-run "5 ⊣ 1 2 3"))
+  (list 5))
+
+(apl-test
+  "5 ⊢ 1 2 3 → 1 2 3 (right)"
+  (mkrv (apl-run "5 ⊢ 1 2 3"))
+  (list 1 2 3))
+
+(apl-test "⍕ 42 → \"42\" (alias for ⎕FMT)" (apl-run "⍕ 42") "42")