SAC-30973: Exclude un-auth streams

[satyendra101]

Description of change

• Added access token context manager check in init
• Streams are now probed during schema creation to check accessibility
• Un-auth streams are removed from the catalog by doing a small probe.
• Added unittests.
  JIRA: https://qlik-dev.atlassian.net/browse/SAC-30973

Manual QA steps

• Unittests running

Risks

Rollback steps

• revert this branch

AI generated code

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[Copilot]

Pull request overview

This PR updates the tap’s discovery/catalog generation so that streams which are inaccessible with the provided credentials are detected early (via lightweight endpoint probes) and excluded from the discovered catalog. It also ensures credentials are verified at startup by using IntercomClient as a context manager, and adds unit tests around the new behavior.

Changes:

• Add per-stream accessibility probing during schema creation and exclude unauthorized/inaccessible streams from the catalog.
• Verify credentials on startup by wrapping tap execution in with IntercomClient(...) as client:.
• Add probe configuration for POST-based streams and introduce unit tests for stream probing and pruning behavior.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/unittests/test_schema.py	Adds unit tests for probing/access checks, pruning inaccessible child streams, and catalog filtering.
tests/unittests/test_init.py	Updates init tests to account for IntercomClient context manager usage and new discover signature.
tap_intercom/streams.py	Adds probe metadata (probe_http_method, probe_search_query) for POST-search based streams.
tap_intercom/schema.py	Implements stream probing, inaccessible stream filtering, and child-pruning during schema discovery.
tap_intercom/discover.py	Changes discover() to accept an IntercomClient and pass it into get_schemas().
tap_intercom/client.py	Adds probe_stream() helper for GET/POST probing.
tap_intercom/init.py	Wraps main execution in IntercomClient context manager and threads client into discovery.

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