fix: include dialect in all early-return metadata paths

Address behavioral analysis findings: the NO SCHEMA early returns in
validate, semantics, and equivalence tools, plus the NO MANIFEST and
MODEL NOT FOUND early returns in impact-analysis, were missing the
dialect field in their metadata. All return paths now consistently
include dialect for telemetry.

Co-Authored-By: Vijay Yadav <vijay@studentsucceed.com>

Author: VJ-yadav

packages/opencode/src/altimate/tools/altimate-core-equivalence.ts

@@ -24,7 +24,7 @@ export const AltimateCoreEquivalenceTool = Tool.define("altimate_core_equivalenc
         "No schema provided. Provide schema_context or schema_path so table/column references can be resolved."
       return {
         title: "Equivalence: NO SCHEMA",
-        metadata: { success: false, equivalent: false, has_schema: false, error },
+        metadata: { success: false, equivalent: false, dialect: args.dialect, has_schema: false, error },
         output: `Error: ${error}`,
       }
     }

packages/opencode/src/altimate/tools/altimate-core-semantics.ts

@@ -23,7 +23,7 @@ export const AltimateCoreSemanticsTool = Tool.define("altimate_core_semantics",
         "No schema provided. Provide schema_context or schema_path so table/column references can be resolved."
       return {
         title: "Semantics: NO SCHEMA",
-        metadata: { success: false, valid: false, issue_count: 0, has_schema: false, error },
+        metadata: { success: false, valid: false, issue_count: 0, dialect: args.dialect, has_schema: false, error },
         output: `Error: ${error}`,
       }
     }

packages/opencode/src/altimate/tools/altimate-core-validate.ts

@@ -24,7 +24,7 @@ export const AltimateCoreValidateTool = Tool.define("altimate_core_validate", {
         "No schema provided. Provide schema_context or schema_path so table/column references can be resolved."
       return {
         title: "Validate: NO SCHEMA",
-        metadata: { success: false, valid: false, has_schema: false, error },
+        metadata: { success: false, valid: false, dialect: args.dialect, has_schema: false, error },
         output: `Error: ${error}`,
       }
     }

packages/opencode/src/altimate/tools/impact-analysis.ts

@@ -37,7 +37,7 @@ export const ImpactAnalysisTool = Tool.define("impact_analysis", {
       if (!manifest.models || manifest.models.length === 0) {
         return {
           title: "Impact: NO MANIFEST",
-          metadata: { success: false },
+          metadata: { success: false, dialect: args.dialect },
           output: `No models found in manifest at ${args.manifest_path}. Run \`dbt compile\` first to generate the manifest.`,
         }
       }
@@ -54,7 +54,7 @@ export const ImpactAnalysisTool = Tool.define("impact_analysis", {
           .join(", ")
         return {
           title: "Impact: MODEL NOT FOUND",
-          metadata: { success: false },
+          metadata: { success: false, dialect: args.dialect },
           output: `Model "${args.model}" not found in manifest. Available models: ${available}${manifest.models.length > 10 ? ` (+${manifest.models.length - 10} more)` : ""}`,
         }
       }