Document packed raw SFX addressing

vm-map/opcodes.toml

@@ -1731,16 +1731,16 @@ abi_source = "kelebek+decode-validated"
 [opcode.semantics]
 name = "sfx-load"
 category = "audio"
-summary = "(resource_id)(channel) — synchronously resolve/open the scene-manifest asset and replace the channel's decoded sound buffer without starting playback. Native manager supports channels 0..12; SC0000 uses 0..9."
+summary = "(packed_raw_resource_id)(channel) — synchronously open the universal SYS4INI/AAI catalog entry and replace the channel's decoded sound buffer without starting playback. A zero high byte is a raw SYS4INI index; a nonzero high byte selects an append catalog and uses the low 24-bit index. Native manager supports channels 0..12; SC0000 uses 0..9."
 noop_headless = false
 source = "investigation"
 confidence = "high"
 depends_on = []
-evidence = "Ghidra op 0xb4 handler 0x4201d0 -> sfx_channel_load@0x482500 -> asset_open@0x44f390 + sound_decode_channel@0x483360. Native trace: SC0000 0xc29 loads resource 0x28 into channel 0; resource resolves by section_base+id to E0808.WAV; completion precedes 0xb5 in the same millisecond."
+evidence = "Ghidra /v2: op_0xb4_sfx_load@0x4201d0 -> sfx_channel_load@0x482500 -> asset_open_indexed_entry@0x44f390 + sound_decode_channel@0x483360. The opener indexes the base catalog directly for a zero high byte and selects mounted_aai[high_byte] otherwise. SC0000 0xc29 uses raw 0x28 = E0808.WAV. TITLE independently proves the addressing rule: raw 0x2aea = SE020.WAV is preloaded on channel 2 and started on every hover-selection change; raw 0x3321 = SE015.WAV is loaded/started on activation. A synchronized port trace executes those loads and starts but reports file=null because Godot incorrectly applies TITLE's 14-entry scene manifest."
 
 [[opcode.semantics.args]]
 i = 1
-role = "resource_id"
+role = "packed raw resource id"
 observed_types = ["imm", "g-int", "l-ptr"]
 
 [[opcode.semantics.args]]