Convert all INFO logs to DEBUG to reduce CLI noise

Converted ~77 info! macro calls to debug! across the codebase to prevent
log messages from interrupting the CLI experience during normal operation.
Users can still see these logs by setting RUST_LOG=debug if needed.

Affected crates:
- g3-cli
- g3-computer-control
- g3-console
- g3-core
- g3-ensembles
- g3-execution
- g3-providers

crates/g3-providers/src/anthropic.rs

@@ -328,7 +328,7 @@ impl AnthropicProvider {
         tracing::debug!("create_request_body called: max_tokens={}, disable_thinking={}, thinking_budget_tokens={:?}", max_tokens, disable_thinking, self.thinking_budget_tokens);
 
         let thinking = if disable_thinking {
-            tracing::info!(
+            tracing::debug!(
                 "Thinking mode explicitly disabled for this request (max_tokens={})",
                 max_tokens
             );