chore: bump version to v5.2.7

Changes in v5.2.7:
- Security fix: pass env vars via process environment instead of command line
- Prevents ANTHROPIC_API_KEY leakage in ps/logs
- Add SetEnv() interface to commandRunner
- Type-safe env parsing with 1MB file size limit
- Comprehensive test coverage for loadMinimalEnvSettings()

Related: #89, PR #92

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Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

codeagent-wrapper/main.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	version             = "5.2.6"
+	version             = "5.2.7"
 	defaultWorkdir      = "."
 	defaultTimeout      = 7200 // seconds (2 hours)
 	codexLogLineLimit   = 1000