[profiler] Search by table/view name - #6764

Clean profiler feature: search now matches table/view names in addition to node IDs and persistent-ID substrings, and reveals hidden matches by expanding their collapsed ancestors before centering on the next layout.

Nice touches:

• CircuitProfile.byName is populated from the dataflow's MIR pass and keyed lowercase; findByName prefers an exact match over a substring match, which is the right precedence for named tables that happen to be substrings of view names (the port/report test pins this).
• ComplexNode.collapsedOperation() cleanly separates the collapsed label (operation + contained names) from the expanded label; Cytograph only calls it when a node is drawn as a cluster, so the semantic split is enforced structurally rather than by convention.
• The previous fallback that walked to the outermost parent and toggled it was blunt; CircuitSelector.expandAncestors expands only the collapsed ancestors that actually hide the target, and Visualizer.reveal() clears centerOnNextLayout when nothing was expanded so an unrelated later layout does not surprise the user.
• Tests cover name indexing, substring fallback, exact-over-substring precedence, and ancestor propagation of contained names.

Second commit is trivial: names all connectors entries in the medallion demo and fixes the pipelie_sources → pipeline_sources typo in sec-ops. Both silence warnings without behavior change.

CI is green. No AI trailers.

One minor observation, non-blocking: findByName's substring fallback iterates byName.entries() in insertion order, so with multiple substring matches the earliest-inserted wins. That is deterministic given a fixed dataflow, but the ordering is not part of the documented contract — worth a note if a user ever asks "why did it pick this one?".

Approving.

LGTM. Did you find node indexes for the purposes of the search benefitial?