feat(server): add boocontext deep analysis tools and synthesis pipeline

- get_symbol_details: type signature, definition location, usage count
- get_call_graph: callers, callees, transitive references
- get_blast_radius added to SYNTHESIS_TOOLS

apps/server/src/services/tools/codecontext/get_symbol_details.ts

@@ -0,0 +1,31 @@
+import { z } from 'zod';
+import { makeCodecontextTool } from './factory.js';
+
+export const GetSymbolDetailsInput = z.object({
+  symbol: z.string().describe('Symbol name to resolve'),
+  file_path: z.string().optional().describe('Optional file path to narrow search'),
+});
+export type GetSymbolDetailsInputT = z.infer<typeof GetSymbolDetailsInput>;
+
+const DESCRIPTION =
+  'Returns type signature, definition location, and usage count for a named symbol. ' +
+  'Use after get_codebase_overview to dive deeper into specific functions, classes, or variables.';
+
+const { toolDef: getSymbolDetails, execute: executeGetSymbolDetails } =
+  makeCodecontextTool<GetSymbolDetailsInputT>({
+    name: 'get_symbol_details',
+    schema: GetSymbolDetailsInput,
+    description: DESCRIPTION,
+    jsonParameters: {
+      type: 'object',
+      properties: {
+        symbol: { type: 'string', description: 'Symbol name to resolve' },
+        file_path: { type: 'string', description: 'Optional file path to narrow search' },
+      },
+      required: ['symbol'],
+      additionalProperties: false,
+    },
+    mapArgs: (input) => ({ symbol: input.symbol, file_path: input.file_path }),
+  });
+
+export { getSymbolDetails, executeGetSymbolDetails };