Add Wave contract schemas for pipeline validation

JSON Schema definitions for all pipeline handover contracts
including issue analysis, research, enhancement, and sync flows.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.wave/contracts/web-findings.schema.json

@@ -0,0 +1,85 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "Web Findings",
+  "description": "Structured web research results for a given topic",
+  "type": "object",
+  "required": ["topic", "sources", "search_queries"],
+  "properties": {
+    "topic": {
+      "type": "string",
+      "description": "The topic that was researched"
+    },
+    "sources": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["url", "title", "key_ideas", "relevance_to_topic"],
+        "properties": {
+          "url": {
+            "type": "string",
+            "format": "uri",
+            "description": "Source URL"
+          },
+          "title": {
+            "type": "string",
+            "description": "Article or page title"
+          },
+          "author": {
+            "type": "string",
+            "description": "Author name if available"
+          },
+          "date": {
+            "type": "string",
+            "description": "Publication date if available"
+          },
+          "key_ideas": {
+            "type": "array",
+            "minItems": 1,
+            "items": { "type": "string" },
+            "description": "Key ideas extracted from the source"
+          },
+          "quotes": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "required": ["text"],
+              "properties": {
+                "text": {
+                  "type": "string",
+                  "description": "Direct quote from source"
+                },
+                "context": {
+                  "type": "string",
+                  "description": "Context for the quote"
+                }
+              }
+            },
+            "description": "Notable direct quotes"
+          },
+          "relevance_to_topic": {
+            "type": "number",
+            "minimum": 0,
+            "maximum": 1,
+            "description": "Relevance score (0-1)"
+          },
+          "source_type": {
+            "type": "string",
+            "enum": ["blog_post", "academic_paper", "documentation", "news_article", "conference_talk", "book_excerpt", "other"],
+            "description": "Type of source"
+          }
+        }
+      },
+      "description": "Web sources found and analyzed"
+    },
+    "search_queries": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "Search queries that were executed"
+    },
+    "timestamp": {
+      "type": "string",
+      "format": "date-time"
+    }
+  }
+}