feat: add slack notifications

Author: kasin-it

src/workflows/implementation.ts

@@ -134,6 +134,8 @@ export async function implementationWorkflow(ticketId: string) {
   const ticket = await fetchAndValidateTicket(ticketId, env.COLUMN_AI);
   if (!ticket) return;
 
+  await notifySlack(`Task ${ticket.identifier} started — implementing`);
+
   const branchName = `blazebot/${ticket.identifier.toLowerCase()}`;
   await createFeatureBranch(branchName, env.GITHUB_BASE_BRANCH);
 

src/workflows/review-fix.ts

@@ -125,6 +125,8 @@ export async function reviewFixWorkflow(
   const ticket = await fetchAndValidateTicket(ticketId, env.COLUMN_AI);
   if (!ticket) return;
 
+  await notifySlack(`Task ${ticket.identifier} started — fixing review feedback`);
+
   const { pr, comments, hasConflicts } = await fetchPRContext(branchName);
 
   const requirementsMd = await assembleReviewFixRequirements(