chore: scrub internal session-log narrative from code comments

Wide sweep across the codebase to remove leftover artifacts of internal
development sessions, internal entity naming, and audit-code references
that point at non-public docs. The technical reasoning for each piece
of code stays; the "Caught 2026-05-XX while debugging XYZ at preprod"
narrative goes.

Categories scrubbed:
- Dated session-log comments ("Caught/Surfaced/Discovered 2026-05-XX")
  → rewritten as neutral technical reasoning.
- Internal audit codes (AUDIT-H2, AUDIT-C2, AUDIT-M2, AUDIT-H5, etc.)
  referencing a non-public audit doc → labels stripped, fix reasoning
  kept.
- Internal-entity names in code comments (Sulkta-specific, Sulkta runs
  X, Terrapin/TRP as gov-token names) → generic phrasing.
- Test fixture helper `sulkta_cfg` → `test_dao_cfg`; test DAO name
  string `"sulkta"` → `"test-dao"`. On-chain addresses in test fixtures
  kept (they're real-world wire-byte test data on public chain).
- Cross-references to memory files / non-public audit docs
  (`internal notes`, `aiken-escrow/README.md`)
  → reasoning inlined or removed.
- Test names renamed: `decodes_sulkta_live_governor_datum` →
  `decodes_live_governor_datum`, `decodes_sulkta_live_proposal_zero` →
  `decodes_live_finished_proposal`, etc.

Kept (legitimate):
- Cross-references to in-repo audit docs (aiken-escrow/README.md, aiken-escrow/README.md) — they ARE the
  public artifacts being referenced.
- HIGH-1/HIGH-2/MED-2/LOW labels on escrow fixes — these correspond to
  findings in the in-repo audit doc.
- TODO markers — legitimate work-still-to-do.

crates/aldabra-dao/examples/dump_governor.rs

@@ -1,8 +1,7 @@
 //! Dump a sample GovernorDatum as PlutusData CBOR hex.
 //!
-//! Used during preprod DAO bringup (2026-05-07) to construct the
-//! inline datum for the governor bootstrap tx. Edit the values in
-//! `main()` to your DAO's parameters and run:
+//! Useful for constructing the inline datum for a governor bootstrap
+//! tx — edit the values in `main()` to your DAO's parameters and run:
 //!
 //! ```sh
 //! cargo run --example dump_governor -p aldabra-dao --release