gqa(adr-0064/0065): flat-ops CompositeCmd (P1) + structural dispatch cost (ADR-0064 Rev2); promote ADR-0064

ADR-0065 P1: CompositeCmd -> flat ordered ops list (drop legacy op/a/b/out_addr fields); OpSpec.operands dict + out handle. Meaning-preserving (op_log byte-equal); pe_scheduler + op_log read the head op.

ADR-0064 Rev2: replace Rev1 per-op cost table with structural FIXED + logical_bytes*R formula. logical_bytes on every PeCommand; new common/pe_cost_model.py; cost centralized in TLContext._emit (load/recv_async charge explicitly); pe_cpu/kernel_runner wire the per-PE model + clock. D7: cap exceeded -> ValueError (no auto-segmentation). Remove Rev1 cpu_issue_cost.py + its tests. No goldens churn.

Promote ADR-0064 Rev2 Proposed->Accepted (docs/adr/ + docs/adr-ko/); amend D7 (error not segmentation) + record P1-before-P0 ordering in ADR-0064/0065 Migration notes (EN+KO).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_triton_emu.py

@@ -178,9 +178,11 @@ def test_tl_composite_nonblocking():
     assert isinstance(h, CompletionHandle)
     comp_cmds = [c for c in tl.commands if isinstance(c, CompositeCmd)]
     assert len(comp_cmds) == 1
-    assert comp_cmds[0].op == "gemm"
-    assert comp_cmds[0].out_addr == 0x3000
-    assert comp_cmds[0].out_nbytes == 32 * 32 * 2  # M×N×dtype_bytes
+    # Flat-ops shape (ADR-0065 D1): head op carries kind + write-back handle.
+    head = comp_cmds[0].ops[0]
+    assert head.kind == "gemm"
+    assert head.out.addr == 0x3000
+    assert head.out.nbytes == 32 * 32 * 2  # M×N×dtype_bytes
 
 
 # ── 8. tl.wait(handle) → WaitCmd ─────────────────────────────────