feat: PolicyControllerAi integration — Forge AI decision interception via policy server

## New File
- PolicyControllerAi.java (840 lines): Extends Forge's PlayerControllerAi
  to intercept AI decisions at chooseSpellAbilityToPlay() and route them
  through the Python policy server. Falls back to Forge built-in AI on
  any failure. Inner PolicyAiController overrides AiController with full
  legal action gathering via ComputerUtilAbility.

## Wiring
- GameSession.java: Import + Javadoc for PolicyControllerAi decision flow.
  Logs decision pipeline when policy server connects. End-of-game reward
  submission via PolicyControllerAi lifecycle.
- BatchRunner.java: New setPolicyServer(url) method. Appends
  --policy midrange --policyServer <url> to Forge subprocess command when
  policy server URL is configured.

## Path Updates (Forge-Repo rename)
- README.md: Forge link → KoalaTrapLord/Forge-Repo, build path updated
- .env.example: FORGE_JAR_PATH and FORGE_WORKING_DIR → Forge-Repo
- lab_api.py: Auto-detect paths try Forge-Repo first, forge-repo as legacy

## MacroActionExecutor
- Added public isRemovalCard(), isDrawCard(), isRampCard() wrappers so
  PolicyControllerAi can consult the same card-role databases.

Refs: Issue #83 Phase 2.4

README.md

@@ -171,13 +171,13 @@ OCR pipeline for physical Magic cards using the Ximilar API. Scan cards from pho
 | Maven | 3.8+ |
 | Node.js | 18+ (for LAN client scripts) |
 | Ollama | Latest (for local LLM inference) |
-| [Forge](https://github.com/Card-Forge/forge) | Built at `D:\ForgeCommander\forge-repo` |
+| [Forge](https://github.com/KoalaTrapLord/Forge-Repo) | Built at `D:\ForgeCommander\Forge-Repo` |
 
 ### Setup (Windows)
 
 ```powershell
 # 1. Build Forge (one-time)
-cd D:\ForgeCommander\forge-repo
+cd D:\ForgeCommander\Forge-Repo
 mvn package -pl forge-gui-desktop "-DskipTests" "-Drevision=2.0.12-SNAPSHOT" -am
 
 # 2. Build Commander AI Lab