feat(agents): add GPT-5.2 specialized prompts for oracle and momus

- Add isGpt5_2Model type guard\n- ORACLE_GPT_5_2_PROMPT consolidating all knowledge from Claude default, GPT-5.4 generic, and GPT-5.5 variants (XML-tagged blocks, concrete verbosity clamps, long-context re-grounding, anti-narration tool rules, high-risk self-check)\n- MOMUS_GPT_5_2_PROMPT preserving blocker-finder philosophy with new tool_usage_rules block for parallel reference verification\n- Momus GPT-5.2 reasoningEffort set to xhigh per evaluation rigor needs

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/agents/types.ts

@@ -96,6 +96,11 @@ export function isGpt5_3CodexModel(model: string): boolean {
   return modelName.includes("gpt-5.3-codex") || modelName.includes("gpt-5-3-codex");
 }
 
+export function isGpt5_2Model(model: string): boolean {
+  const modelName = extractModelName(model).toLowerCase();
+  return modelName.includes("gpt-5.2") || modelName.includes("gpt-5-2");
+}
+
 export function isClaudeOpus47Model(model: string): boolean {
   const modelName = extractModelName(model).toLowerCase().replaceAll(".", "-");
   return modelName.includes("claude-opus-4-7");