docs: update documentation for v7.1 remote CLIProxy feature

- README: add remote CLIProxy section with CLI flags and quick setup
- code-standards: add Config Priority Pattern (CLI > ENV > config.yaml)
- codebase-summary: add new remote proxy files, update test counts (638)
- project-overview-pdr: add FR-008 requirement, v7.1 release section
- project-roadmap: add Phase 10 (Remote CLIProxy), mark #142 complete
- system-architecture: add Remote CLIProxy Flow diagram

docs/code-standards.md

@@ -580,6 +580,26 @@ interface Config { ... }
 export interface Config { ... }
 ```
 
+### 5. Config Priority Pattern
+
+When resolving configuration from multiple sources, follow this priority order:
+
+```typescript
+// proxy-config-resolver.ts pattern
+// Priority: CLI flags > Environment variables > config.yaml > defaults
+
+const resolved = {
+  ...DEFAULT_CONFIG,                    // 4. Defaults (lowest)
+  ...yamlConfig,                        // 3. config.yaml
+  ...envConfig,                         // 2. Environment variables
+  ...cliFlags,                          // 1. CLI flags (highest)
+};
+```
+
+This pattern is used in:
+- `src/cliproxy/proxy-config-resolver.ts` - Remote proxy config
+- `src/config/unified-config-loader.ts` - Main config loading
+
 ---
 
 ## Related Documentation