feat: 🎉 postgresql broker first commit of forked prototype from my original code

broker.example.yaml

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+# PostgreSQL Broker Configuration Example
+
+# Database connections settings
+# The broker can manage multiple databases, each with its own instance and queues
+# Important: Each database can only have ONE active broker instance
+databases:
+  # First database
+  - name: db1  # Unique identifier for this database connection
+    host: localhost
+    port: 5432
+    database: broker_db1
+    user: postgres
+    password: your_password_here
+    sslmode: disable  # Options: disable, require, verify-ca, verify-full
+    max_open_conns: 25
+    max_idle_conns: 5
+    conn_max_lifetime: 5m
+    conn_max_idle_time: 10m
+    queue_count: 4  # Number of concurrent queues for this database
+
+  # Second database (optional - add as many as needed)
+  - name: db2
+    host: localhost
+    port: 5432
+    database: broker_db2
+    user: postgres
+    password: your_password_here
+    sslmode: disable
+    max_open_conns: 25
+    max_idle_conns: 5
+    conn_max_lifetime: 5m
+    conn_max_idle_time: 10m
+    queue_count: 2  # Can have different queue count per database
+
+# Broker settings (applied to all database instances)
+broker:
+  name: pgsql-broker
+  fetch_query_que_size: 100  # Number of jobs to process per fetch cycle
+  queue_timer_sec: 10  # Seconds between queue polls
+  queue_buffer_size: 50  # Size of job buffer per queue
+  worker_idle_timeout_sec: 10  # Worker idle timeout
+  notify_retry_seconds: 30s  # LISTEN/NOTIFY retry interval
+  enable_debug: false  # Enable debug logging
+
+# Logging settings
+logging:
+  level: info  # Options: debug, info, warn, error
+  format: json  # Options: json, text