Clean SSH tunneling patch for MongoDB and Oracle drivers

CONTRIBUTING.md

@@ -11,30 +11,63 @@ To ensure consistency, we follow a structured contribution process. All guidelin
 
 ## 🎃 Hacktoberfest 2025 @ OLake
 
-OLake is officially open for **Hacktoberfest contributions**! 🚀  
+OLake is officially open for **Hacktoberfest contributions**! 🚀
 
 If you’re participating in Hacktoberfest, look out for any issues labeled:
+
 - **`hacktoberfest`**
 - **`good first issue`**
 
 These are designed to help new contributors get started quickly.  
-We welcome everything — bug fixes, documentation updates, tests, or feature enhancements.  
+We welcome everything — bug fixes, documentation updates, tests, or feature enhancements.
 
 👉 [Check our open issues here](../../issues)
 
 Let’s hack, learn, and grow together this Hacktoberfest. Happy contributing & happy engineering! ⚡
 
 ---
 
+## 🔐 Testing SSH Tunnel Support (Oracle & MongoDB)
+
+OLake drivers for **Oracle** and **MongoDB** now support SSH tunneling via a local port-forwarded connection.
+
+To test this feature:
+
+1. Generate a dummy PEM key:
+
+   ```bash
+   ssh-keygen -t rsa -b 2048 -m PEM -f test_key.pem -N ""
+
+   ```
+
+2. Place the key in the appropriate driver folder:
+   drivers/oracle/internal/test_key.pem
+   drivers/mongodb/internal/test_key.pem
+
+3. Run the tests:
+   go test -v -run TestOracleSSHConnection
+   go test -v -run TestMongoSSHConnection
+
+These tests are designed to fail gracefully if no SSH server is running on localhost:2222, but they validate:
+
+- SSH key parsing
+- Tunnel setup logic
+- DSN override behavior
+
+This ensures contributors can safely test SSH logic without needing a real bastion.
+
 ## Getting Help
 
 For any questions, concerns, or queries:
-- Start a discussion on our [**Slack**](https://olake.io/slack/) channel.  
-- Check [GitHub Discussions](https://github.com/datazip-inc/olake/discussions) for ongoing conversations.  
+
+- Start a discussion on our [**Slack**](https://olake.io/slack/) channel.
+- Check [GitHub Discussions](https://github.com/datazip-inc/olake/discussions) for ongoing conversations.
 - Don’t hesitate to open an issue if something is unclear.
 
 ---
 
 ### 💡 We look forward to your feedback and contributions to improve this project!
-<!----variables----> 
+
+<!----variables---->
+
 [CLA]: https://docs.google.com/forms/d/e/1FAIpQLSdze2q6gn81fmbIp2bW5cIpAXcpv7Y5OQjQyXflNvoYWiO4OQ/viewform

drivers/mongodb/go.mod

@@ -81,4 +81,6 @@ require (
 	golang.org/x/text v0.24.0 // indirect
 	golang.org/x/tools v0.30.0 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
-)
+)
+
+replace github.com/datazip-inc/olake/pkg/ssh => ../../pkg/ssh

drivers/mongodb/internal/config.go

@@ -23,6 +23,13 @@ type Config struct {
 	RetryCount       int      `json:"backoff_retry_count"`
 	ChunkingStrategy string   `json:"chunking_strategy"`
 	UseIAM           bool     `json:"use_iam"`
+
+	// SSH tunneling support
+	SSHEnabled     bool   `json:"ssh_enabled"`
+    SSHHost        string `json:"ssh_host"`
+    SSHPort        int    `json:"ssh_port"`
+    SSHUser        string `json:"ssh_user"`
+    SSHPrivateKey  string `json:"ssh_private_key"`	
 }
 
 func (c *Config) URI() string {