feat: crud-pricing initial implementation

Complete CRUD service for AWS pricing operations - single source of truth.

Features:
- Dual pricing model (retail + account-specific with auto EDP/PPA detection)
- Get/Put pricing operations with intelligent caching
- AWS Pricing API integration for public list prices
- AWS Cost Explorer integration for account-specific pricing
- Access counting for self-learning 14-day refresh
- Query most-accessed instances (powers smart refresh)
- TTL: 30 days (retail), 7 days (account-specific)

Architecture:
- All other lambdas use this for pricing operations
- No direct DynamoDB access from other components
- Consistent schema enforcement
- Complete IAM setup for Pricing API, Cost Explorer, STS

Infrastructure:
- Complete Terraform configuration
- Full CI/CD pipeline (Jenkinsfile)
- Comprehensive documentation
- Production-ready scaffolding

Part of Phase 1 - foundation for pricing system.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,38 @@
+[package]
+name = "crud-pricing"
+version = "0.1.0"
+edition = "2021"
+
+[[bin]]
+name = "bootstrap"
+path = "src/main.rs"
+
+[dependencies]
+# AWS SDK
+aws-config = { version = "1.5", features = ["behavior-version-latest"] }
+aws-sdk-dynamodb = "1.60"
+aws-sdk-pricing = "1.60"
+aws-sdk-costexplorer = "1.60"
+aws-sdk-sts = "1.60"
+
+# Lambda runtime
+lambda_runtime = "0.13"
+tokio = { version = "1", features = ["full"] }
+
+# Serialization
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+
+# Date/Time
+chrono = { version = "0.4", features = ["serde"] }
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+
+# Error handling
+anyhow = "1.0"
+thiserror = "1.0"
+
+[dev-dependencies]
+tokio-test = "0.4"