docs: update Python version references from 3.8+ to 3.10+

Update all documentation to reflect the new minimum Python version:
- README.md
- Installation.md
- How-to-build-from-sources.md
- Developer.md (also update pyenv example to 3.13.0)
- How-to-use-with-gunicorn.md (remove obsolete Python 3.7 caveats)

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

Author: wu-sheng

README.md

@@ -31,7 +31,7 @@
 
 ## Installation Requirements
 
-SkyWalking Python Agent requires [Apache SkyWalking 8.0+](https://skywalking.apache.org/downloads/#SkyWalkingAPM) and Python 3.8+.
+SkyWalking Python Agent requires [Apache SkyWalking 8.0+](https://skywalking.apache.org/downloads/#SkyWalkingAPM) and Python 3.10+.
 
 > If you would like to try out the latest features that are not released yet, please refer to this [guide](docs/en/setup/faq/How-to-build-from-sources.md) to build from sources.
 

docs/en/contribution/Developer.md

@@ -28,7 +28,7 @@ Once you have `make` ready, run `make env`, this will automatically install the
 Note: Make sure you have `python3` aliased to `python` available on Windows computers instead of pointing to the Microsoft app store.
 
 ### Switching between Multiple Python Versions
-Do not develop/test on Python < 3.8, since Poetry and some other functionalities we implement rely on Python 3.8+
+Do not develop/test on Python < 3.10, since Python 3.8/3.9 have reached end of life
 
 If you would like to test on multiple Python versions, run the following to switch and recreate virtual environment:
 #### Without Python Version Tools
@@ -39,7 +39,7 @@ poetry install
 
 #### With Python Version Tools
 ```shell
-pyenv shell 3.9.11
+pyenv shell 3.13.0
 poetry env use $(pyenv which python)
 poetry install
 ```

docs/en/setup/Installation.md

@@ -1,6 +1,6 @@
 ## Installation
 
-**SkyWalking Python agent requires SkyWalking 8.0+ and Python 3.8+**
+**SkyWalking Python agent requires SkyWalking 8.0+ and Python 3.10+**
 
 You can install the SkyWalking Python agent via various ways described next.
 

docs/en/setup/faq/How-to-build-from-sources.md

@@ -3,7 +3,7 @@
 **Download the source tar from the [official website](http://skywalking.apache.org/downloads/), 
 and run the following commands to build from source**
 
-**Make sure you have Python 3.8+ and the `python3` command available**
+**Make sure you have Python 3.10+ and the `python3` command available**
 
 ```shell
 $ tar -zxf skywalking-python-src-<version>.tgz

docs/en/setup/faq/How-to-use-with-gunicorn.md

@@ -12,12 +12,7 @@ serves requests.
 
 ## Automatic Injection Approach (Non-intrusive)
 
-> Caveat: Although E2E test passes for Python3.7, 
-> there's a small chance that this approach won't work on Python 3.7 if your application uses gPRC protocol AND subprocess AND fork together
-> (you will immediately see service is not starting normally, not randomly breaking after)  
-> This is due to an unfixed bug in gRPC core that leads to deadlock if Python 3.7 application involves subprocess (like debug mode). 
-> You should upgrade to Python 3.8+ soon since the EOL is approaching on 2023 June 27th, 
-> or fallback to manual approach should this case happen, or simply use HTTP/Kafka protocol.
+> Note: Python 3.10+ is required. Earlier versions (3.7-3.9) are no longer supported.
 
 **TL;DR:** specify `-p` or `--prefork` in `sw-python run -p` and all Gunicorn workers and master will get their own working agent.