Verbose per-call LLM logging, raw request/response dumps, and end-of-log cost summary.

- [LLM] line per call: stage, model, prompt size, output size, cost, parsed item counts
- LLM_RAW_DUMP: full prompt/response JSON per call under outputs/<job>/llm_raw/
- Cost block at tail of job.log (per-stage, per-model, cached vs live)
- Agent mode: reset llm cost counters per job; review finalization now teed into job.log + dumps

NOTES.md

@@ -91,6 +91,9 @@ Pipeline `print()` is teed for the job thread ([backend/job_log.py](backend/job_
 - UI: “Run log” panel updates while running; stays visible after finish/fail/review
 - Failures append the **full traceback** to the log; each run starts with a header line (job id, mode, models, start time)
 - `outputs/<job_id>/job.json` (written at start) carries email/mode/models so the disk fallback can rebuild a job after restart
+- **Verbose LLM observability** (`LLM_VERBOSE=true`, default on): one `[LLM] #NNNN stage | model (backend) | in/out sizes | cost | parsed-item counts` line per call in `job.log` — list-valued keys show counts (`conflicts[3]`) so empty (miss) or invented (hallucination) results stand out
+- **Raw dumps** (`LLM_RAW_DUMP=true`, default on): full prompt + raw response per call in `outputs/<job_id>/llm_raw/NNNN_stage_model.json` (base64 images excluded, `n_images` recorded). This is the source for tracing *why* the model missed/invented an item
+- **End-of-log cost**: every run ends with an `=== Estimated LLM cost (this run) ===` block (total, per-stage, models); failed runs append a cost-so-far line. Local/hybrid calls have no $ accounting — total covers OpenRouter only
 
 ## Vision vs text models