feat: add PostgreSQL schema isolation for playground environment

- Create schema.rs utility module with table_name() function
- Add schema prefix to all SQL queries in postgres_db.rs
- Support dev schema for playground, public for production
- Add DATABASE_SCHEMA, MONGODB_DATABASE, QDRANT_COLLECTION config
- Fix 40+ functions including videos, chunks, frames, vectors, etc.
- Update Cargo dependencies

src/core/config.rs

@@ -78,6 +78,15 @@ pub static SERVER_PORT: Lazy<u16> = Lazy::new(|| {
 pub static REDIS_KEY_PREFIX: Lazy<String> =
     Lazy::new(|| env::var("MOMENTRY_REDIS_PREFIX").unwrap_or_else(|_| "momentry:".to_string()));
 
+pub static DATABASE_SCHEMA: Lazy<String> =
+    Lazy::new(|| env::var("DATABASE_SCHEMA").unwrap_or_else(|_| "public".to_string()));
+
+pub static MONGODB_DATABASE: Lazy<String> =
+    Lazy::new(|| env::var("MONGODB_DATABASE").unwrap_or_else(|_| "momentry".to_string()));
+
+pub static QDRANT_COLLECTION: Lazy<String> =
+    Lazy::new(|| env::var("QDRANT_COLLECTION").unwrap_or_else(|_| "momentry_rule1".to_string()));
+
 pub mod processor {
     use super::*;
 

src/core/db/mod.rs

@@ -1,6 +1,8 @@
 use anyhow::Result;
 use async_trait::async_trait;
 
+pub mod schema;
+
 use crate::core::chunk::Chunk;
 
 #[derive(Debug, Clone)]

src/core/db/schema.rs

@@ -0,0 +1,30 @@
+use crate::core::config::DATABASE_SCHEMA;
+use once_cell::sync::Lazy;
+
+pub static SCHEMA_PREFIX: Lazy<String> = Lazy::new(|| {
+    let schema = DATABASE_SCHEMA.as_str();
+    if schema == "public" {
+        String::new()
+    } else {
+        format!("{}.", schema)
+    }
+});
+
+pub fn table_name(table: &str) -> String {
+    let prefix = SCHEMA_PREFIX.as_str();
+    if prefix.is_empty() {
+        table.to_string()
+    } else {
+        format!("{}{}", prefix, table)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_table_name_public() {
+        assert_eq!(table_name("videos"), "videos");
+    }
+}