Summary

• Wire is_reasoning_model() / record_reasoning_quality_failure() into the agent tool execution path: quality failures (ToolNotFound, InvalidParameters, TypeMismatch) from reasoning-enhanced models (o1, o3, o4-mini, QwQ, DeepSeek-R1, Claude extended-thinking) now emit a reasoning_amplification WARN log and count in the anomaly window; gated by AnomalyConfig::reasoning_model_warning (default true)
• Populate AuditEntry.error_phase from ToolErrorCategory::phase() in ShellExecutor, WebScrapeExecutor, and pre-execution verifier audit entries — was always null
• Resolve compression.compress_provider from [[llm.providers]] at bootstrap and pass the named provider to handle_compress_context() LLM call; falls back to primary provider when field is empty or resolution fails

Changes

#2357 — is_reasoning_model() + error_phase wiring

• tool_execution/mod.rs: new AnomalyOutcome::ReasoningQualityFailure { model, tool } variant; record_anomaly_outcome() dispatches to det.record_reasoning_quality_failure() when debug_state.reasoning_model_warning = true
• tool_execution/native.rs (Err arm): sets ReasoningQualityFailure when is_quality_failure && is_reasoning_model(provider.name())
• state/mod.rs: DebugState.reasoning_model_warning: bool field mirrors AnomalyConfig::reasoning_model_warning
• builder.rs: stores anomaly_config.reasoning_model_warning into DebugState in apply_session_config()
• shell/mod.rs, scrape.rs: log_audit now sets error_phase from e.category().phase().label()
• native.rs pre-execution verifier block: error_phase = Some("setup")

#2356 — compress_provider wiring

• state/mod.rs: ProviderState.compress_provider: Option<AnyProvider> (#[cfg(feature = "context-compression")])
• builder.rs: with_compress_provider() builder method (feature-gated)
• bootstrap/mod.rs: build_compress_provider() reads config.memory.compression.compress_provider and resolves via create_named_provider() (feature-gated)
• runner.rs: wires build_compress_provider() → with_compress_provider() inside #[cfg(feature = "context-compression")]
• native.rs: handle_compress_context() uses providers.compress_provider.as_ref().unwrap_or(&self.provider)

Test plan

• cargo +nightly fmt --check — clean
• cargo clippy -p zeph-tools -- -D warnings — clean
• cargo clippy -p zeph-core -- -D warnings — clean
• cargo clippy -p zeph-core --features context-compression -- -D warnings — clean
• cargo nextest run -p zeph-tools -p zeph-core --lib --bins — 2047 passed
• cargo nextest run -p zeph-core --features context-compression --lib --bins — 1212 passed

Closes #2357
Closes #2356