rename ckpts stock_{16f,32f}_10pct -> baseline_* (naming consistency)

Cleanup: remove flat 4b_stock/4b_v9_1 (moved into S2) + mistaken flat 32f dirs

Reorg: move 16f stock/v9_1 ckpts into S2 stage-first tree (drop machine name, tag 16f)

Reorg: flatten 32f ckpts to ckpts/{v10_2_32f,stock_32f}

Add 4B 32f inference ckpt under stage-first ckpts/ -> ckpts/S2/4b/qwen3_5_2b/stock_32f_10pct/v0-20260606-044138/checkpoint-785

Add 4B 32f inference ckpt under stage-first ckpts/ -> ckpts/S2/4b/qwen3_5_2b/v10_2_32f_10pct/v0-20260610-154054/checkpoint-785

remove write-path test marker

write-path test marker

Remove ckpts placeholder now that real ckpts landed

Add 4B MLLM ckpt: 4b_v9_1 (checkpoint-505, inference weights)

Add 4B MLLM ckpt: 4b_stock (checkpoint-505, inference weights)

Create ckpts/ folder for current trained checkpoints