chore(pipeline): bump all dependencies to latest stable versions

- Airflow 2.11 → 3.1 (BashOperator moved to providers-standard)
- Meltano 3.5 → 4.1 (meltano.yml version 2, meltanolabs target-postgres)
- dbt-postgres 1.9 → 1.10
- singer-sdk 0.39 → 0.53 (all 6 taps)
- Typesense Docker 27.1 → 30.1
- Typesense Python client >=2.0
- Python base image 3.12 → 3.13

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

pipeline/meltano.yml

@@ -1,4 +1,4 @@
-version: 1
+version: 2
 project_id: school-compare-pipeline
 
 plugins:
@@ -71,8 +71,8 @@ plugins:
 
   loaders:
     - name: target-postgres
-      variant: transferwise
-      pip_url: pipelinewise-target-postgres
+      variant: meltanolabs
+      pip_url: meltanolabs-target-postgres
       config:
         host: $PG_HOST
         port: $PG_PORT
@@ -84,7 +84,7 @@ plugins:
   utilities:
     - name: dbt-postgres
       variant: dbt-labs
-      pip_url: dbt-postgres~=1.9
+      pip_url: dbt-postgres~=1.10
       config:
         project_dir: $MELTANO_PROJECT_ROOT/transform
         profiles_dir: $MELTANO_PROJECT_ROOT/transform