Use Python 3.14 as default everywhere

Update devcontainer, DE integration tests workflow, and docs to use
Python 3.14 as the primary/default version.

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

Author: sdebruyn

.devcontainer/devcontainer.json

@@ -1,6 +1,6 @@
 {
   "name": "dbt-fabric",
-  "image": "mcr.microsoft.com/devcontainers/python:3.13",
+  "image": "mcr.microsoft.com/devcontainers/python:3.14",
   "features": {
     "ghcr.io/devcontainers/features/azure-cli:1": {},
     "ghcr.io/devcontainers/features/github-cli:1": {},

.github/workflows/integration-tests-de.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v7
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: Install dependencies
         run: uv sync --all-extras --all-groups
@@ -157,7 +157,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v7
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: Install dependencies
         run: uv sync --all-extras --all-groups
@@ -234,7 +234,7 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v7
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: Install dependencies
         run: uv sync --all-extras --all-groups

docs/comparison-dbt-fabric.md

@@ -215,7 +215,8 @@ The upstream's warehouse snapshot approach hooks into the connection manager's `
 | 3.8-3.10 | No | Listed in classifiers |
 | 3.11 | Yes (tested in CI) | Yes |
 | 3.12 | Yes (tested in CI) | Not listed |
-| 3.13 | Yes (tested in CI, primary) | Not listed |
+| 3.13 | Yes (tested in CI) | Not listed |
+| 3.14 | Yes (tested in CI, primary) | Not listed |
 
 ### dbt feature compatibility
 
@@ -235,7 +236,7 @@ The upstream's warehouse snapshot approach hooks into the connection manager's `
 
 | Aspect | dbt-fabric-samdebruyn | microsoft/dbt-fabric |
 |---|---|---|
-| **DW test matrix** | Python 3.11/3.12/3.13 on weekly; 3.13 on PR/push | Python 3.11 only |
+| **DW test matrix** | Python 3.11/3.12/3.13/3.14 on weekly; 3.14 on PR/push | Python 3.11 only |
 | **DE (Spark) test matrix** | Weekly + on-demand via `/test-de` PR comment | N/A |
 | **Auth in CI** | OIDC federated credentials (`workload_identity`) | OIDC via Azure login action |
 | **Runner** | `ubuntu-latest` | Custom Docker container |

docs/comparison-dbt-fabricspark.md

@@ -165,7 +165,7 @@ Notable differences:
 |---|---|---|
 | **Total commits** | 500+ since Jan 2025 | 329 total, ~278 since Jan 2025 |
 | **Release tags** | 67+ (v1.4.0rc1 to v1.11.3b0) | 8 (v1.7.0rc1 to v1.11.0) |
-| **Python** | 3.11-3.13 | 3.10-3.13 |
+| **Python** | 3.11-3.14 | 3.10-3.13 |
 | **Documentation** | [Docs website](https://dbt-fabric.debruyn.dev) + development guide | README + CONTRIBUTING.md |
 | **Code style** | ruff, PEP 604, line-length 99 | ruff, older typing style |
 
@@ -212,7 +212,7 @@ Both `LivySession.__exit__` and `LivyCursor.__exit__` return `True` (`livysessio
 
 ### Inconsistent style
 
-The upstream mixes camelCase (`tokenPrint`, `accessToken`, `_submitLivyCode`, `_getLivySQL`) with snake_case throughout. Pre-3.9 typing aliases (`Dict`, `List`, `Optional`, `Union`) are used despite targeting Python 3.13.
+The upstream mixes camelCase (`tokenPrint`, `accessToken`, `_submitLivyCode`, `_getLivySQL`) with snake_case throughout. Pre-3.9 typing aliases (`Dict`, `List`, `Optional`, `Union`) are used despite targeting Python 3.10+.
 
 ---
 

docs/feature-comparison.md

@@ -31,7 +31,7 @@ This adapter is compatible with **dbt Core 1.11 and 1.12**. Microsoft's dbt-fabr
 
 ### Python version support
 
-This adapter is tested on **Python 3.11, 3.12, and 3.13**. Microsoft's dbt-fabric still lists Python 3.8-3.10 in its classifiers but does not test on 3.12 or 3.13.
+This adapter is tested on **Python 3.11, 3.12, 3.13, and 3.14**. Microsoft's dbt-fabric still lists Python 3.8-3.10 in its classifiers but does not test on 3.12+.
 
 ## Dual engine support
 
@@ -187,7 +187,7 @@ Microsoft's dbt-fabric has a single utility macro (`get_tables_by_pattern`). Mic
 
 ### Test suite
 
-This adapter has **444 integration test classes** across 141 test files, covering both the Fabric and FabricSpark adapters. Tests run automatically on every pull request across Python 3.11, 3.12, and 3.13. Microsoft's dbt-fabric has 117 test classes on Python 3.11 only. Microsoft's dbt-fabricspark has 141 test classes.
+This adapter has **444 integration test classes** across 141 test files, covering both the Fabric and FabricSpark adapters. Tests run automatically on every pull request across Python 3.11, 3.12, 3.13, and 3.14. Microsoft's dbt-fabric has 117 test classes on Python 3.11 only. Microsoft's dbt-fabricspark has 141 test classes.
 
 The test suite covers all standard dbt adapter operations plus adapter-specific features: Purview integration, Python models, warehouse snapshots, community package compatibility, and utility function overrides.