test: add comprehensive integration tests for telemetry signals

Add 38 integration tests that verify all 7 telemetry signals fire
through real code paths with spy on Telemetry.track():

- Signal 1: quality signal derivation + error/abandoned/cancelled cases
- Signal 2: intent classifier with 10 real DE prompts + PII safety
- Signal 3: tool chain collection with error recovery state machine
- Signal 4: error fingerprint hashing + consecutive error flush
- Signal 5: SQL fingerprint via altimate-core (aggregation, CTE, DDL)
- Signal 6: environment_census expansion + backward compatibility
- Signal 7: schema complexity bucketing + zero-table edge case
- Full E2E: complete session simulation with all 7 signals in order

Also fixes regex patterns for natural language flexibility:
- dbt debug: allows words between "dbt" and error keywords
- migrate: allows words between "to/from" and warehouse name

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

packages/opencode/src/altimate/telemetry/index.ts

@@ -561,7 +561,7 @@ export namespace Telemetry {
     const patterns: Array<{ intent: string; strong: RegExp[]; weak: RegExp[] }> = [
       {
         intent: "debug_dbt",
-        strong: [/dbt\s+(error|fail|bug|issue|broken|fix|debug|not\s+work)/],
+        strong: [/dbt\s+.*?(error|fail|bug|issue|broken|fix|debug|not\s+work)/],
         weak: [/dbt\s+(run|build|test|compile|parse)/, /dbt_project/, /ref\s*\(/, /source\s*\(/],
       },
       {
@@ -591,7 +591,7 @@ export namespace Telemetry {
       },
       {
         intent: "migrate_sql",
-        strong: [/migrat|convert.*(?:to|from)\s+(?:snowflake|bigquery|postgres|redshift|databricks)/, /translate.*(?:sql|dialect)/],
+        strong: [/migrat|convert.*(?:to|from)\s+.*?(?:snowflake|bigquery|postgres|redshift|databricks)/, /translate.*(?:sql|dialect)/],
         weak: [/dialect|transpile|port\s+(?:to|from)/],
       },
       {