chore: restore corrupted defaults and add api_key_env

ai/honcho/config.toml

@@ -29,7 +29,7 @@ URL = "redis://honcho-redis:6379/0"
 [llm]
 DEFAULT_MAX_TOKENS = 4096
 
-# Embeddings via Ollama (nomic-embed-text recommended on this system)
+# Embeddings via Ollama
 [embedding]
 VECTOR_DIMENSIONS = 768
 MAX_INPUT_TOKENS = 8192
@@ -39,7 +39,7 @@ transport = "openai"
 model = "nomic-embed-text"
 base_url = "http://ollama:11434/v1"
 
-# --- Deriver (user representation builder) ---
+# --- Deriver ---
 [deriver]
 ENABLED = true
 WORKERS = 1
@@ -50,6 +50,7 @@ FLUSH_ENABLED = true
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 # --- Dialectic ---
 [dialectic]
@@ -63,6 +64,7 @@ MAX_OUTPUT_TOKENS = 512
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 [dialectic.levels.low]
 MAX_TOOL_ITERATIONS = 3
@@ -70,6 +72,7 @@ MAX_TOOL_ITERATIONS = 3
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 [dialectic.levels.medium]
 MAX_TOOL_ITERATIONS = 2
@@ -77,6 +80,7 @@ MAX_TOOL_ITERATIONS = 2
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 [dialectic.levels.high]
 MAX_TOOL_ITERATIONS = 4
@@ -84,6 +88,7 @@ MAX_TOOL_ITERATIONS = 4
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 [dialectic.levels.max]
 MAX_TOOL_ITERATIONS = 10
@@ -91,6 +96,7 @@ MAX_TOOL_ITERATIONS = 10
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 # --- Summary ---
 [summary]
@@ -102,6 +108,7 @@ MESSAGES_PER_LONG_SUMMARY = 60
 transport = "openai"
 model = "deepseek-v4-flash"
 base_url = "https://opencode.ai/zen/go/v1"
+api_key_env = "OPENAI_API_KEY"
 
 # --- Dream ---
 [dream]