fix: version bumping and Docker registry authentication (#17)

## Summary

This PR fixes the release workflow to properly handle version bumping on PR merge and uses the new Docker registry authentication secrets.

## Changes

### Release Workflow (release.yml)
- **Version Bumping**: Now automatically bumps version on PR merge
  - Determines bump type from commit messages (major/minor/patch)
  - Commits version bump to `package.json` and `CHANGELOG.md`
  - Creates git tag for the release
- **Docker Registry Auth**: Uses `DOCKER_LOGIN` and `DOCKER_PASSWORD` secrets
  - Falls back gracefully if secrets are not configured
- **Tag Handling**: Checks if tag exists before creating (prevents failures)

### PR Workflow (pr.yml) - NEW
- Runs unit tests on every PR
- Analyzes commits to suggest bump type
- Comments the suggested bump type on the PR

### Documentation
- Added `WORKFLOW_ARCHITECTURE.md` explaining the workflow design

## Workflow Architecture

**Two-step process:**
1. **PR Workflow** (on PR): Analyzes commits and suggests bump type
2. **Release Workflow** (on merge): Bumps version, creates tag, builds Docker image

## Benefits

1. **No CI Loops**: Version bump commits are detected and skipped
2. **Clear Communication**: PR comments inform developers of version impact
3. **Semantic Versioning**: Automated adherence to semver rules
4. **Traceability**: Git tags and changelog reflect all changes

## Testing

The new workflows will be tested when this PR is merged.

Closes #13 (Add database test safety configuration)

Reviewed-on: #17
Co-authored-by: David Gwilliam <dhgwilliam@gmail.com>
Co-committed-by: David Gwilliam <dhgwilliam@gmail.com>

scripts/python/generate_games.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""
+Generate 100+ games to test ELO rating calculations
+"""
+
+import sqlite3
+import random
+from datetime import datetime, timedelta
+
+DB_PATH = "prisma/prisma/dev.db"
+
+
+def get_players():
+    """Get all players from the database"""
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+    cursor.execute("SELECT id, name, currentElo FROM players")
+    players = cursor.fetchall()
+    conn.close()
+    return players
+
+
+def generate_game(players, game_num, base_date):
+    """Generate a single game with random players and scores"""
+    # Randomly select 4 different players
+    selected_players = random.sample(players, 4)
+    p1, p2, p3, p4 = selected_players
+
+    # Randomly assign teams (Team 1 vs Team 2)
+    team1_p1 = p1
+    team1_p2 = p2
+    team2_p1 = p3
+    team2_p2 = p4
+
+    # Generate realistic scores (Euchre games typically 10 points max)
+    # Team 1 wins 60% of the time for variety
+    team1_wins = random.random() < 0.6
+    if team1_wins:
+        # Team 1 wins - generate scores
+        team1_score = random.randint(10, 15)
+        team2_score = random.randint(0, 9)
+    else:
+        # Team 2 wins - generate scores
+        team2_score = random.randint(10, 15)
+        team1_score = random.randint(0, 9)
+
+    # Generate random date in the past 30 days
+    days_ago = random.randint(0, 30)
+    game_date = base_date - timedelta(
+        days=days_ago, hours=random.randint(0, 23), minutes=random.randint(0, 59)
+    )
+
+    return {
+        "team1P1Id": team1_p1[0],
+        "team1P2Id": team1_p2[0],
+        "team2P1Id": team2_p1[0],
+        "team2P2Id": team2_p2[0],
+        "team1Score": team1_score,
+        "team2Score": team2_score,
+        "playedAt": game_date.isoformat() + "Z",
+        "status": "completed",
+        "eventId": None,
+    }
+
+
+def insert_games(games):
+    """Insert games into the database"""
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+
+    for game in games:
+        cursor.execute(
+            """
+            INSERT INTO matches 
+            (team1P1Id, team1P2Id, team2P1Id, team2P2Id, team1Score, team2Score, playedAt, status, eventId, createdAt, updatedAt)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+        """,
+            (
+                game["team1P1Id"],
+                game["team1P2Id"],
+                game["team2P1Id"],
+                game["team2P2Id"],
+                game["team1Score"],
+                game["team2Score"],
+                game["playedAt"],
+                game["status"],
+                game["eventId"],
+                datetime.now().isoformat() + "Z",
+                datetime.now().isoformat() + "Z",
+            ),
+        )
+
+    conn.commit()
+    conn.close()
+
+
+def main():
+    print("Generating 150 games to test ELO ratings...")
+    print("=" * 60)
+
+    players = get_players()
+    print(f"Found {len(players)} players in database")
+
+    # Generate 150 games
+    num_games = 150
+    base_date = datetime.now()
+
+    games = []
+    for i in range(num_games):
+        game = generate_game(players, i, base_date)
+        games.append(game)
+
+    print(f"Generated {len(games)} games")
+
+    # Insert games into database
+    print("Inserting games into database...")
+    insert_games(games)
+    print("Games inserted successfully!")
+
+    # Show sample games
+    print("\nSample games:")
+    print("-" * 80)
+    for i, game in enumerate(games[:3]):
+        print(
+            f"Game {i + 1}: Team 1 ({game['team1Score']}) vs Team 2 ({game['team2Score']})"
+        )
+        print(f"  Team 1: Player {game['team1P1Id']} + Player {game['team1P2Id']}")
+        print(f"  Team 2: Player {game['team2P1Id']} + Player {game['team2P2Id']}")
+        print(f"  Date: {game['playedAt']}")
+        print()
+
+    print("=" * 60)
+    print(f"Total games generated: {num_games}")
+    print("Now check the ELO ratings by running the application!")
+
+
+if __name__ == "__main__":
+    main()