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>

Jenkinsfile

@@ -0,0 +1,114 @@
+pipeline {
+    agent any
+
+    options {
+        ansiColor('xterm')
+        disableConcurrentBuilds()
+    }
+
+    stages {
+        stage('Setup') {
+            steps {
+                echo '🔧 Verifying Rust environment...'
+                sh '''
+                    rustc --version
+                    cargo --version
+                '''
+            }
+        }
+
+        stage('Install Tools') {
+            steps {
+                echo '📦 Installing test tools...'
+                sh '''
+                    if ! command -v cargo-nextest &> /dev/null; then
+                        cargo install cargo-nextest
+                    fi
+                    if ! command -v cargo-llvm-cov &> /dev/null; then
+                        cargo install cargo-llvm-cov
+                    fi
+                    if ! command -v cargo-audit &> /dev/null; then
+                        cargo install cargo-audit
+                    fi
+                    rustup component add llvm-tools-preview
+                '''
+            }
+        }
+
+        stage('Security Audit') {
+            steps {
+                echo '🔒 Running cargo audit...'
+                sh '''
+                    cargo audit --json > audit-report.json || true
+                '''
+            }
+        }
+
+        stage('Check Code') {
+            steps {
+                echo '🔍 Running cargo check...'
+                sh '''
+                    cargo check --message-format json > cargo-check.log || true
+                '''
+            }
+        }
+
+        stage('Run Tests with Coverage') {
+            steps {
+                echo '🧪 Running tests with coverage...'
+                sh '''
+                    # Run tests with nextest and generate JUnit
+                    cargo nextest run --profile ci --verbose || true
+
+                    # Create coverage directory and generate coverage
+                    mkdir -p coverage
+                    cargo llvm-cov nextest --cobertura --output-path coverage/cobertura.xml || true
+                '''
+            }
+        }
+
+        stage('Generate Docs') {
+            steps {
+                echo '📚 Generating documentation...'
+                sh '''
+                    cargo doc --no-deps || true
+                '''
+            }
+        }
+
+        stage('Publish Results') {
+            steps {
+                echo '📋 Publishing test results, coverage, and warnings...'
+                junit allowEmptyResults: true, testResults: 'target/nextest/ci/junit.xml'
+                recordCoverage(tools: [[parser: 'COBERTURA', pattern: '**/cobertura.xml']])
+                recordIssues tool: cargo(pattern: 'cargo-check.log')
+
+                echo '📚 Publishing documentation...'
+                publishHTML(target: [
+                    allowMissing: true,
+                    alwaysLinkToLastBuild: true,
+                    keepAll: true,
+                    reportDir: 'target/doc',
+                    reportFiles: 'crud_pricing/index.html',
+                    reportName: 'Rust Documentation'
+                ])
+            }
+        }
+    }
+
+    post {
+        always {
+            echo '🧹 Archiving artifacts...'
+            archiveArtifacts artifacts: 'coverage/**/*.xml, target/nextest/**/*.xml, cargo-check.log, audit-report.json', allowEmptyArchive: true
+        }
+        success {
+            echo '✅ Build completed!'
+        }
+        unstable {
+            echo '⚠️  Build unstable - some tests may have failed'
+        }
+        failure {
+            echo '❌ Build failed!'
+        }
+    }
+}