fix(mcp): clarify that CodeGraph analyzes user's project, not itself

Updated initial_instructions.md to eliminate confusion about what
CodeGraph analyzes. Previously, wording could be misinterpreted as
"get information about CodeGraph" rather than "use CodeGraph to
analyze your project."

Changes:
- Header (line 3): Added "CodeGraph analyzes the USER'S PROJECT in
  the current working directory"
- Rule #1 (line 9): Changed "codebase exploration" to "analyze the
  user's project codebase"
- Rule #2 (line 11): Changed "explore a codebase" to "explore the
  user's project"
- Introduction (line 7): Added emphasis "analyze the user's working
  project codebase" and "code in the current working directory"
- Decision tree (line 41): Changed "find code?" to "find code in the
  user's project?"
- Decision tree (line 45): Changed "Use CodeGraph tool" to "Use
  CodeGraph to analyze the project"

Impact:
- Eliminates client confusion about CodeGraph's purpose
- Makes it crystal clear CodeGraph analyzes YOUR code, not itself
- Improves UX for MCP clients receiving automatic instructions
- No functional changes, only clarity improvements

Verified:
- Build successful
- Initialize response contains clarified text

Author: jruokola

crates/codegraph-mcp/src/prompts/initial_instructions.md

@@ -1,14 +1,15 @@
 # CODEGRAPH MANDATORY USAGE PROTOCOL
 # ===================================
+# CodeGraph analyzes the USER'S PROJECT in the current working directory
 # THESE INSTRUCTIONS ARE NON-NEGOTIABLE - FAILURE TO COMPLY WASTES CONTEXT
 
 ## CRITICAL: READ THIS FIRST
 
-You have access to CodeGraph, an autonomous code intelligence system with 7 agentic tools that leverage a frontier reasoning model with 2M token context window.
+You have access to CodeGraph, an autonomous code intelligence system with 7 agentic tools that **analyze the user's working project codebase**. CodeGraph uses a frontier reasoning model with 2M token context window to explore and understand the code in the current working directory.
 
-**MANDATORY RULE #1:** You MUST use CodeGraph agentic tools for ALL codebase exploration BEFORE using any built-in file reading or grep tools.
+**MANDATORY RULE #1:** You MUST use CodeGraph agentic tools to analyze the user's project codebase BEFORE using any built-in file reading or grep tools.
 
-**MANDATORY RULE #2:** You MUST NEVER use grep, find, read_file, or cat to explore a codebase when CodeGraph tools are available.
+**MANDATORY RULE #2:** You MUST NEVER use grep, find, read_file, or cat to explore the user's project when CodeGraph tools are available.
 
 **MANDATORY RULE #3:** You MUST let CodeGraph's multi-step reasoning complete - do NOT interrupt or assume you need more information while a tool is running.
 
@@ -38,11 +39,11 @@ You have access to CodeGraph, an autonomous code intelligence system with 7 agen
 ## QUICK DECISION TREE
 
 ```
-START: Need to understand or find code?
+START: Need to understand or find code in the user's project?
 │
 ├── YES → Is CodeGraph connected?
 │         │
-│         ├── YES → MANDATORY: Use CodeGraph tool
+│         ├── YES → MANDATORY: Use CodeGraph to analyze the project
 │         │         │
 │         │         ├── Finding code?        → agentic_code_search
 │         │         ├── Understanding deps?  → agentic_dependency_analysis