Port compiler.rs HIR cost-model statics to specs/compiler/hir_cost_models.t27 through t27o #9114

tri t27o bootstrap/src/compiler.rs converts these associated fns, which take and return only u32/i64. Each was run alone through tri t27o --check on the lab at master ea1bccd, and its oracle passed (7 vectors each; the vectors are generic, so see #9102):

• TimingModel: est_comb_delay, est_reg_to_reg_delay, slack, fmax_from_delay
• PowerModel: est_lut_dynamic, est_ff_dynamic, est_bram_dynamic, est_dsp_dynamic, est_static
• RouteModel: est_wire_length, est_congestion
• CtsModel: est_buffers_needed, est_tree_levels

Port pattern (region-safe): keep each hand fn's signature and replace its body with one call into the generated module, so the diff stays inside the listed fns. Callers (analyze_module exists twice in the file, so it cannot be a region) are not edited.

User Scenarios

• Given TimingModel::fmax_from_delay(2000), when compiler.rs runs it, then the value comes from hir_cost_models::fmax_from_delay and equals what the hand body returned.
• Given the existing unit tests test_est_comb_delay .. test_est_tree_levels_three, when cargo test --release runs, then they pass unchanged.

Requirements

• FR-001: specs/compiler/hir_cost_models.t27 MUST define the 13 functions and the constants they read (Self::... consts become module consts), with t27o's bodies, and tests that call each by name with expected values printed by the hand Rust on the lab (boundary values: 0, 1, the thresholds in each body, u32::MAX where it does not overflow).
• FR-002: bootstrap/gen/rust/compiler/hir_cost_models.rs MUST be unedited t27c gen-rust output, mounted by #[path].
• FR-003: Each listed hand fn MUST become a one-line call into the generated module.
• FR-004: The PR MUST be net <= 0 in foreign lines, show gen / gen-verilog / gen-rust / gen-c byte-identical over every tracked spec (master t27c vs branch t27c), match cargo test --release of clean master, and re-compute bootstrap/stage0/FROZEN_HASH.

Success Criteria

• t27c test-report specs/compiler/hir_cost_models.t27 reports 0 FAIL and 0 vacuous, with a test per function.
• t27c gen-rust specs/compiler/hir_cost_models.t27 is byte-equal to bootstrap/gen/rust/compiler/hir_cost_models.rs.
• The diff touches compiler.rs only inside the fns named in this issue, apart from the one #[path] mount block at the top of the file.
• cargo test --release in bootstrap/ gives the same pass and fail counts and failure names as clean master.

Region lines to be added once the merge-side region check is live (see #9062).

Boundary

• specs/compiler/hir_cost_models.t27
• bootstrap/gen/rust/compiler/hir_cost_models.rs
• .trinity/seals/compiler_HirCostModels.json
• bootstrap/stage0/FROZEN_HASH