Add support for hashing transformations and caching configuration

Enhancements:
- Introduced HashTransform for hashing field values using algorithms like MD5, SHA256, and Murmur.
- Added commit strategy configuration to control commit semantics (manual vs. auto) and enable dead letter queues.
- Implemented caching backend configuration options, including local, Redis, and Kafka-backed caches.

Documentation:
- Updated README and SECRETS.md to reflect new features and usage examples.
- Enhanced examples to demonstrate multi-cluster secure pipelines and secret management.

Benefits:
✅ Improved data processing capabilities with hashing.
✅ Flexible commit strategies for message delivery.
✅ Enhanced caching options for better performance and scalability.

Author: rahulbsw

.gitignore

@@ -7,3 +7,4 @@ Cargo.lock
 config.json
 *.log
 test-values.yaml
+operator/target

Cargo.toml

@@ -45,6 +45,21 @@ async-trait = "0.1"
 bytes = "1.7"
 regex = "1.10"  # Regular expressions
 
+# Hashing functions
+md-5 = "0.10"
+sha2 = "0.10"
+murmur3 = "0.5"
+digest = "0.10"
+hex = "0.4"
+
+# Caching
+moka = { version = "0.12", features = ["future"] }
+dashmap = "6.0"  # Concurrent HashMap
+redis = { version = "0.24", features = ["tokio-comp", "connection-manager"], optional = true }
+
+# Retry logic
+tokio-retry = "0.3"
+
 [dev-dependencies]
 testcontainers = "0.23"
 criterion = { version = "0.5", features = ["html_reports"] }
@@ -60,3 +75,10 @@ harness = false
 [[bench]]
 name = "transform_benchmarks"
 harness = false
+
+[features]
+default = ["hash-functions", "local-cache"]
+hash-functions = []
+local-cache = []
+redis-cache = ["redis"]
+all-caches = ["local-cache", "redis-cache"]