Support smart scheduling across daemons

[kerthcet]

What this PR does / why we need it

Which issue(s) this PR fixes

Fixes #

Special notes for your reviewer

Does this PR introduce a user-facing change?

[Copilot]

Pull request overview

This PR updates daemon listing/filtering to support multi-label (AND) matching end-to-end across the Rust registry and the Python API, and refreshes docs/tests/examples to use the “daemon/server” terminology and the new filtering interface.

Changes:

• Replace single (label_key, label_value) filtering with an optional labels: HashMap filter (AND semantics) in the Rust registry and the PyO3 API.
• Update Python wrapper/tests to call list_daemons(labels={...}), including new multi-label integration/E2E assertions.
• Improve E2E session output collection and add a new programmatic session example.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
server/src/registry.rs	Changes daemon listing filter to accept a labels map and apply AND logic.
server/src/lib.rs	Updates PyO3 list_daemons signature to accept an optional labels dict.
README.md	Updates docs terminology and quick-start snippets (server/daemon).
python/tests/test_unit.py	Updates unit tests to call list_daemons(labels=...).
python/tests/test_integration.py	Updates integration tests for label filtering, adds multi-label AND test.
python/tests/test_e2e.py	Updates E2E label filtering calls; adds a same-daemon concurrency test; improves session multiline reading.
python/sandd/init.py	Updates Python wrapper list_daemons signature/docs and call into Rust binding.
examples/programmatic_session.py	Adds a new example showing programmatic session usage patterns.

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