feature: implement bot fresh start flag and receive elf solder buff

[eduardosmaniotto]

Summary

Implements #853. Bot improvements: fresh-character startup, friendlier combat targets for low-level bots, Elf Soldier buff trips, and real-player skill parity — bots learn exactly what a player could.

Changes

Start as fresh characters (StartAsFreshCharacters)

• New bot option: freshly generated bots start like new players (level 1, level-0 starter gear, no reset history) instead of as leveled veterans.
• The veteran path becomes a BotStartupProfile, chosen at generation (BotStartupProfile.For(...)). Documented in docs/Bots.md; covered by BotStartupProfileTests.

Combat level headroom

• CombatHandler.IsSafeTarget now engages monsters up to LevelHeadroom (5) levels above a bot's effective level, so fresh level-1 bots can actually find targets; true safety still comes from the existing damage/defense checks. Two new CombatHandlerTests cases.

Elf Soldier buff trips

• Bots claim the free buff a dialog NPC offers (Elf Soldier): when configured and qualifying, they walk over (warping home first if needed), talk, request the buff and close the dialog like a player.
• BotBuffHandler caches the offers once per game configuration; trips are errands like shopping — they beat hunting/party-follow, and BotPartyHandler declines invites meanwhile. Orchestrated in BotNavigator.TryBuffTripAsync; a no-op on servers without a buff NPC.

Skill parity with real players

• Bots no longer learn skills that only come from an item — orb, scroll, weapon, pet — when the skill itself carries no requirements: the gate lives on the item, so a fresh DK no longer gets Twisting Slash, an MG no Fire Slash/Power Slash, an Elf no Ice Arrow, a DL no Earthshake/Force Wave, an RF no Killing Blow/Beast Uppercut/Phoenix Shot.
• Item-granted skills with requirements of their own stay learnable once the bot qualifies (Rageful Blow at 170). The item-granted set is derived from the server config (GetItemGrantedSkillNumbers), so future items are covered automatically; one explicit entry stays for a skill whose granting weapon isn't in the config.
• Applied at generation and level-up; bot builds no longer differ between reset and classic servers.

[sven-n]

Reviewed the bot buff trips, startup profiles, and stat-weight changes. Two correctness concerns noted inline; the rest looks good.

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Generated by Claude Code

[sven-n]

Both review findings are addressed in e96ec5e: the failed buff-trip path now applies the full NextBuffCheckUtc() backoff, and the effect-scan catch is narrowed to InvalidOperationException with a debug log. CI is green. LGTM.

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Generated by Claude Code