Replace unmaintained opentele with opentele2 (Python 3.13 support)

[SINSQQ]

Summary

Replaces the unmaintained opentele dependency with opentele2 (its maintained drop-in fork) so TDATA conversion works again on Python 3.13.

Root cause

On Python 3.13, importing opentele raises a hard-coded BaseException("err") inside opentele.utils.__new__, which fires during module import — so even from TGConvertor import SessionManager blows up before any code runs. Confirmed on the current master:

File ".../opentele/utils.py", line 121, in __new__
    raise BaseException("err")
BaseException: err

opentele2 is the maintained fork. It exposes the same public surface this package relies on (opentele.td.TDesktop, Account, AuthKeyType, AuthKey, opentele.td.configs.DcId) — verified locally on Python 3.13.

Changes

File	What changed
TGConvertor/sessions/tdata.py	from opentele.td ... → from opentele2.td ... (and opentele2.td.configs)
TGConvertor/manager.py	Error messages now tell users to install opentele2 instead of opentele
pyproject.toml	[tdata] extra: opentele → opentele2>=1.2.1 (first release with Python 3.13 wheels)

Compatibility notes

• opentele2 is a drop-in replacement at the import-path level — same class names, same method signatures used here.
• No runtime behavior change for users on Python ≤ 3.12; they only get the updated pip-install hint.
• No public API change in TGConvertor itself.

Testing done

• pip install opentele2 succeeds on Python 3.13.13.
• from opentele2.td import TDesktop, Account, AuthKeyType, AuthKey and from opentele2.td.configs import DcId import cleanly.
• DcId(2), AuthKeyType.ReadFromFile, and AuthKey(bytes, ...) construct as expected.

A full round-trip conversion test (tdata ↔ pyrogram/telethon) needs a real tdata folder, which I don't have handy — would appreciate a maintainer running that as part of review before merging.

⚠️ Please run a full conversion smoke test before merging

Could a maintainer:

1. Pull this branch in a venv with Python 3.13 + opentele2 installed.
2. Convert a real tdata folder → telethon file, and a telethon file → tdata folder.
3. Confirm both round-trips succeed and produce equivalent auth_key / dc_id / user_id.

If anything regresses, I'd rather hear about it before merge than after a release ships.

Closes the import error traced at TGConvertor/sessions/tdata.py#L6 in the linked issue.

[SINSQQ]

🧪 Maintainer action requested — please don't merge until verified

Hi! Opening this PR as a contributor with no push access to master, so I'm explicitly requesting a maintainer review + smoke test before merge.

Why I'm asking for a hold

I verified the import-level fix (the actual BaseException: err from your traceback) on Python 3.13.13:

• pip install opentele2 succeeds
• from opentele2.td import TDesktop, Account, AuthKeyType, AuthKey ✅
• from opentele2.td.configs import DcId ✅
• DcId(2), AuthKeyType.ReadFromFile, AuthKey(bytes, ...) all construct

…but that only proves the import path is fixed. The actual conversion logic in TDataSession.from_tdata / to_folder touches client.mainAccount, account.authKey.key, account.UserId, account.MainDcId, _TDesktop__generateLocalKey(), _setMtpAuthorizationCustom, _addSingleAccount, and SaveTData — and I have no real tdata folder to round-trip against.

What I'd like a maintainer to run

In a fresh venv on Python 3.13 + pip install "tgconvertor[tdata]" from this branch:

1. Read test — TDataSession.from_tdata(some_real_tdata_folder) and assert:
   • auth_key length == 256
   • dc_id is an int in {1, 2, 3, 4, 5}
   • user_id is a positive int
2. Write test — construct a TDataSession(dc_id, auth_key, user_id, api) and call .to_folder(out_path), then re-from_tdata the result and check auth_key / dc_id / user_id round-trip exactly.
3. CLI sanity — tgconvertor tdata-to-telethon <folder> and tgconvertor telethon-to-tdata <file> against the same sample.

If any of those fail, this PR is unsafe to merge — please leave a review with the failure trace and I'll iterate.

Side note

opentele2>=1.2.1 is the pin I chose because that's the first release that ships Python 3.13 wheels and keeps the public opentele.td.* surface stable. If the maintainer team already tracks a different minimum version internally, happy to bump the pin in this same branch — just say the word.

Thanks for reviewing 🙏

[SINSQQ]

🔍 Self-review note — please verify on a real tdata folder

Single-line summary of what changed and what still needs verification by a maintainer:

• tdata.py L6–7: import path swap (opentele → opentele2) — verified at import-time only.
• pyproject.toml: dep swap with >=1.2.1 pin.
• manager.py: error string updates only.

I do not have access to a real tdata folder, so I cannot validate the full conversion path. Please run a round-trip smoke test on Python 3.13 before merging.

[SINSQQ]

⚠️ Verification needed — this is the only behavioral change in the PR. The import path is confirmed working, but the runtime use of TDesktop(basePath=...), client.mainAccount, account.authKey.key, account.UserId, account.MainDcId, _TDesktop__generateLocalKey(), Account(owner=client, api=self.api), _setMtpAuthorizationCustom, _addSingleAccount, and SaveTData(path / "tdata") has not been exercised against a real tdata folder.

Please run a Python 3.13 round-trip (from_tdata → to_folder → from_tdata) on a real sample before merging. If opentele2 renamed or shifted any of those attribute/method names, this is where it would surface.