[Szer]

Adds an optional per-game details list to the Fizruk config. Each entry is a typed status detail with its own fetcher; its line goes into /status after the players line, only while the game pod is Ready. Other games get their own detail types later without touching the core.

First type, factorio-research:

Research: Mining productivity 4 (37.5%).
Research: nothing queued.
Research: unknown (RCON request timed out).

• Reads game.forces.player.current_research and research_progress over the RCON endpoint already declared in the game's players block; config validation rejects the type for a game without RCON.
• Uses /sc (silent-command), so players' in-game consoles don't echo it on every /status.
• No ETA by design: research speed fluctuates, and a two-sample estimate would be noise.
• A save that still has achievements enabled silently swallows its first Lua command (verified against 2.1.20: empty output, then normal output on repeat). The command always prints something (none when idle), so empty output means "refused" and is retried once.
• Rcon.runCommand/execAsync run any command; the players probe is unchanged on top of them. The password lookup moved to Rcon.passwordFor so both callers share it.

Verified: 108 unit tests pass (new: config parsing, name humanizing, parse/format, RCON command round-trip). The exact compiled command string was run against a local factoriotools/factorio:2.1.20 container: first call empty, retry none, then mining-productivity-3\t4\t0.3745 while researching.

Needs a one-line my-infra config change ("details": [{ "type": "factorio-research" }] on the factorio game) after deploy; unknown fields are ignored by the current build, so order doesn't matter.

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