DotaAnalyst: Show the analyst where deaths came from and what they cost

[coreymaher]

Picks up two fields OpenDota started emitting in September:

• deaths_log (Document deaths_log per-death gold lost and time dead odota/core#2973, Add deaths_log with gold lost and time dead per death odota/parser#88): every player gets their total time spent dead, the focus player gets each death with its killer, time dead and gold lost, and deaths to towers, creeps, neutrals and Roshan now appear in the event log, which previously held only hero kills.
• smoke on kills_log (Annotate kills made from smoke in kills_log odota/parser#91): kills made from Smoke of Deceit are marked in the event log.

Non-hero killers are named with the same buckets damageTaken already uses (towers, creeps, neutrals, roshan), now shared through one unitBucket, so the analyst reads one vocabulary for what hurt the player and what killed them.

Gold lost is only sent when nonzero. Turbo has no death gold loss, so Turbo matches never carry it; an Ability Draft match checked against its own gold_reasons matched exactly.

networth_t and the first-blood victim_player_slot were left out: the first duplicates gold_t closely enough not to earn the tokens, and the processor already resolves the first-blood victim from the objective's key.

Adds ~400 tokens (2.4%) to a 31-minute Turbo match's prompt.

Testing

• npm run typecheck, cdk synth and scripts/load-test-bundles.sh pass
• Old and new prompts for match 9013325936 differ only in the added fields and prompt lines
• damageTaken is identical to master on that match after the unitBucket refactor
• A match with deaths_log stripped, as parsed before OpenDota emitted it, produces none of the new fields or log lines
• A/B on that match with gemini-3.8-flash, one call per side, focus player on Disruptor (Turbo, position 5):
  • The new analysis turned the non-hero deaths into a weakness and a recommendation, with the right times: "falling to enemy creeps at 14:03 and to Roshan at 25:20", and "monitor your health and aggro closely near objectives". The old one had no way to see either death.
  • Neither side leaked a raw field name or invented a stat; the gold swing, barracks, ward count and percentile each check out against the match.
  • It did not use time spent dead, though Disruptor's 208s was well below both enemy laners' (Pudge 349s, Earthshaker 329s), nor the five smoke kills. Both are in the data for the analyst to cite when they stand out.
  • The prompt grew by 423 tokens (22,436 to 22,859); output ran longer on this call (1,503 to 2,092 tokens, reasoning included).

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