server: improve autonomous hunt, travel, and supply recovery

[adrunkhuman]

• Let local and NPC-travel-accessible hunts compete in one supply-aware ranking. Incremental route validation checks outbound travel, a depot exit near the hunt, and any required supplier route while protecting fares and recovery funds.
• Keep broke bots productive: separate the two-potion safety floor from optional shopping stock, suppress unchanged failed restocks, and allow short, conservative income-recovery hunts instead of repeated Service selection.
• Adjust challenge pressure from sustained combat evidence, share reliable XP corrections with untested variants, and add session-local potion-consumption estimates.
• Give blocked transit a bounded no-chase breakout rather than repeating failed routes. Preserve blocker evidence across nearby depot-approach changes.
• Increase the default hunt duration from 25 to 40 minutes, delay capacity-driven returns until 30 minutes, and buy up to 20 potions while shopping unless saving for eligible Light Healing or protecting a larger route reserve.
• Add focused recovery/remote-hunt scenarios and policy coverage for transport, supply budgets, calibration, and transit failures.

Known limits

• Hunt selection remains too conservative. Static damage and potion forecasts substantially exceed observed consumption on weak hunts. Capability changes—including levels, skills, and food-regeneration state—can discard potion-learning samples; the ordinary progression run still reports zero accepted samples. This is an initial learning path, not a solved adaptive combat model.
• Learned hunt state lasts only for the controller session. Stronger-hunt exploration and reusable per-monster cost learning remain follow-up work.
• Whole-map planning latency remains a follow-up in Bound hunt planning work and distinguish slice time from selection latency #184. NPC travel supports registered, non-opaque offers, not arbitrary scripted transport. This does not complete the three-town level 8–20 benchmark.

Related: #51, #46, #148, #28, #38, #54.