Stage 5: Add Prisma integration and enhance mission management

- Introduced Prisma as a dependency in package.json and updated pnpm-lock.yaml.
- Created Prisma module and service for database interactions.
- Added initial Prisma schema and migration for user, survivor, mission, and related entities.
- Implemented throttling in the API using @nestjs/throttler for rate limiting.
- Enhanced mission management logic to utilize Prisma for database transactions.
- Updated missions controller and service to handle mission state and participant management.
- Added Twitch PubSub service for real-time updates on mission states.

libs/mission-logic/src/lib/encounter-resolver.ts

@@ -2,11 +2,11 @@ import seedrandom = require('seedrandom');
 import type {
   EncounterDefinition,
   EncounterResult,
-  ModifierApplication,
   Perk,
   SurvivorState,
   SurvivorStats,
 } from '@fog-explorer/api-interfaces';
+import { applyPerkModifiers } from './perk-math';
 
 export interface ResolverInput {
   seed: string;
@@ -23,15 +23,10 @@ export interface ResolverInput {
   };
 }
 
-// Probability adjustments per stat point and per difficulty level.
 const OBJECTIVES_BONUS = 0.02;
 const ALTRUISM_BONUS = 0.02;
 const DIFFICULTY_PENALTY = 0.12;
-
-// Tag that enables the altruism stat bonus.
 const ALTRUISM_TAG = 'altruistic';
-
-// Injury probability floor/ceiling when active survivor fails.
 const INJURY_CHANCE_BASE = 0.8;
 const INJURY_CHANCE_FLOOR = 0.2;
 const SURVIVAL_INJURY_REDUCTION = 0.05;
@@ -40,25 +35,28 @@ export function resolveEncounter(input: ResolverInput): EncounterResult {
   const rng = seedrandom(input.seed);
 
   let probability = input.encounter.baseProbability;
-
   probability -= (input.difficulty - 1) * DIFFICULTY_PENALTY;
   probability += input.survivor.stats.objectives * OBJECTIVES_BONUS;
-
   if (input.encounter.tags.includes(ALTRUISM_TAG)) {
     probability += input.survivor.stats.altruism * ALTRUISM_BONUS;
   }
 
-  const modifiersApplied = applyPerkModifiers(probability, input);
-  probability = modifiersApplied.adjusted;
-  const appliedList = modifiersApplied.applied;
+  const { probability: finalProbability, applied } = applyPerkModifiers(
+    probability,
+    input.survivor.perkSlots,
+    input.encounter.tags
+  );
 
-  probability = Math.max(0, Math.min(1, probability));
-
-  const success = rng() < probability;
+  const success = rng() < finalProbability;
 
   const survivorStateChange = success
     ? null
-    : computeStateChange(rng, input.survivor.state, input.survivor.stats.survival, input.survivor.hookCount);
+    : computeStateChange(
+        rng,
+        input.survivor.state,
+        input.survivor.stats.survival,
+        input.survivor.hookCount
+      );
 
   return {
     missionId: input.missionId,
@@ -68,47 +66,11 @@ export function resolveEncounter(input: ResolverInput): EncounterResult {
     seed: input.seed,
     success,
     survivorStateChange,
-    modifiersApplied: appliedList,
+    modifiersApplied: applied,
     logText: buildLogText(input.encounter.key, success, survivorStateChange),
   };
 }
 
-function applyPerkModifiers(
-  startProbability: number,
-  input: ResolverInput
-): { adjusted: number; applied: ModifierApplication[] } {
-  let probability = startProbability;
-  const applied: ModifierApplication[] = [];
-
-  for (const perk of input.survivor.perkSlots) {
-    for (const mod of perk.modifiers) {
-      if (mod.target !== 'successChance') continue;
-
-      if (mod.condition) {
-        const tagMatch = mod.condition.encounterTags.some((t) =>
-          input.encounter.tags.includes(t)
-        );
-        if (!tagMatch) continue;
-      }
-
-      if (mod.type === 'additive') {
-        probability += mod.amount;
-      } else {
-        probability *= 1 + mod.amount;
-      }
-
-      applied.push({
-        perkKey: perk.key,
-        target: mod.target,
-        type: mod.type,
-        effectiveAmount: mod.amount,
-      });
-    }
-  }
-
-  return { adjusted: probability, applied };
-}
-
 function computeStateChange(
   rng: seedrandom.PRNG,
   currentState: SurvivorState,